Malicious PDF — malware analysis report

Static analysis result for SHA-256 82b1822666af5212…

MALICIOUS

PDF

91.6 KB Created: 2021-08-12 10:21:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 4d55fec8db55c523dc56459355426efc SHA-1: 279c2938931412140525c10e11f2ba81adfaf05a SHA-256: 82b1822666af5212008426637b44b07a5f9fbd1f09be7ba4bf86fc8c5b03aadb
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution campaign. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://boumqueur-edition.com/upload/fckeditor/file/43981195981.pdf In PDF document text
    • http://taketty.xyz/js/ckfinder/userfiles/files/81161616035.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160862ce52d8a1---wilefejawo.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c454fea51ee---poxusubenabo.pdfIn PDF document text
    • http://www.majbrno.cz/uploads/files/41919745546.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/94791681287.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/bebiduwaxazudovesote.pdfIn PDF document text
    • http://cci100.com/clients/57496/File/geziveb.pdfIn PDF document text
    • https://aspirans.com/files/file/tabugugolavev.pdfIn PDF document text
    • http://diplomat2014.ru/ckfinder/userfiles/files/lajufunogabozoxufurowemak.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8dabc5eabe---23171830468.pdfIn PDF document text
    • http://21cedu.com/pds/userfiles/files/16573489092.pdfIn PDF document text
    • http://ekonopuntos.com/campannas/file/modozugoxaditupoxizim.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/293f7c3d7ebe7025aebae724088ac98d/80821629209.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/f5msfh5kki5qssbstsqh8glnr6/zedixufaxaru.pdfIn PDF document text
    • http://goldenpeak.it/userfiles/files/87459262321.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/55afc7f86caffd92b6302b6cbbf4cb7a/60322895121.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/1okd4lrs4kler1c4mnio6q5mp0/wokof.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/42253437069.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/9e7b5ef4d81732da95ae851d313be41c/22568848335.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160d43deacc7b3---41788308966.pdfPDF link annotation
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/d9ab09edd5eccf7cf099c63e6795c08f/firoxat.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/f13c031e1ac303351cc4f74cf4c351cb/bajafivo.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16073acdfc1281---30414934146.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/7okcu54imhfqmrsqvmo85r2umi/86709573106.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=10+s%C4%B1n%C4%B1f+biyoloji+1+%C3%BCnite+konu+anlat%C4%B1m%C4%B1+selin+hocaPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00010e29.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10E29 17932 bytes
SHA-256: 73af1f936f462db059c5a672174333c8f37fa0c4d7644de8dd0c36d2c84fe4bc
font_00_sfnt_off0000decd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECD 19068 bytes
SHA-256: cff956c70f36bfb68de187429360211192aabdccd4f3584c3d4009aae65eed10
font_02_sfnt_off000129f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001420b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1420B 11392 bytes
SHA-256: a90f1fc04ad0f1258e5c8b5766720dbaf2dc8431273749427781ba1b214fb597

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