Malicious PDF — malware analysis report

Static analysis result for SHA-256 a60a429c6d111fa6…

MALICIOUS

PDF

82.3 KB Created: 2021-09-04 03:06:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3d86b11c032679677b2a796f89fe5b2f SHA-1: 034d0b0066dad255e90dcf26f75342d78dd9db51 SHA-256: a60a429c6d111fa65f8a8f0b94c591615071b12c0fb9d8adbda64acdb0baaadb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to numerous external URLs, many hosted on compromised WordPress sites or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://oddluzanie.net/userfiles/file/50097151043.pdf In PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073796203079---mabifajufada.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/82629060311.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/a696f88015c069f2ed1824a9ed766efe/zekezifu.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/5pjacbr6eber3d6n69jpqqve87/83341079488.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611a5ea4d11d9---togiralo.pdfIn PDF document text
    • http://sergeybazarov.ru/file/3889262626.pdfIn PDF document text
    • http://goddesshair.net/upload/users/files/jigotuwizoguv.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/0eef7360604714151bba151fd481c7f1/wubitejedidixus.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/45520600655.pdfIn PDF document text
    • https://juvelyrikoscentras.lt/Files/file/99493591599.pdfIn PDF document text
    • http://sanphamhanquocymy.com/uploads/files/30569648648.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab66efdf36d---55990932194.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d6ce50534---74032369461.pdfIn PDF document text
    • http://csc0451.com/userfiles/file/20210831112049_n72rwt.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/31f5be6e727ef44faa91c1888c277319/fupetem.pdfIn PDF document text
    • http://xenangheli.vn/public/files/gowibovidugejudomip.pdfIn PDF document text
    • https://dm288.rs/slicice/file/35287513251.pdfIn PDF document text
    • http://blueyee.com/upload/file/052303171374.pdfIn PDF document text
    • http://grodgolf.com/clients/f/fd/fd83fa7079552abb47853a85229f74c1/File/suloluteli.pdfIn PDF document text
    • http://antansconstructions.com/ckfinder/userfiles/files/zeraxafurasogonelepidu.pdfIn PDF document text
    • http://africa-emergence2019.com/userfiles/file/29589617777.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/26241ebe5a2216e979305dfe1b62be0a/26161805439.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/34403511247.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160bd2c2f26926---rizoziwazikuvatilinavaxa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=duran+barba+libros+pdf+gratisPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d82a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD82A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF041 10780 bytes
SHA-256: d51278ced2e02f86d561d82ef5869f0d2718e4ba3e91b7cf223bcc57c8701e6b
font_02_sfnt_off000108b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B1 19204 bytes
SHA-256: 2bacc9fcd0bc332eec02b307782e07e8003b559444a94fff08eec18f9ec702d1

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