Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c3f3dfaf8e45672…

MALICIOUS

PDF

82.8 KB Created: 2021-09-06 07:29:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 70e12b28606cc310bfb75ede67c197c3 SHA-1: c68c4e9e328baed5c8130aeb687228cf97ce4d5f SHA-256: 0c3f3dfaf8e45672dcdf4a754e49e36429a691663d4a65e2a7ccac2a603f6200
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, many of which point to compromised CMS upload locations or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c76e277934---61203170998.pdf In PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/7936603300.pdfIn PDF document text
    • http://propack-th.com/image/upload/File/44104243364.pdfIn PDF document text
    • http://kirilmazbardak.com/userfiles/file/58370614044.pdfIn PDF document text
    • http://noahmission.org/dataroom/file/volarebawifedez.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160af7f67ceceb---tumolu.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087e3e850108---54310862149.pdfIn PDF document text
    • http://gyobel.itpublic/file/63670732251.pdfIn PDF document text
    • https://bleikss.com/userfiles/file/sokibo.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/92997408404.pdfIn PDF document text
    • https://jnvhardoi.org/ckfinder/userfiles/files/womokomajizaxip.pdfIn PDF document text
    • http://www.rodnolespropertymanagement.com/siteuploads/editorimg/file/xamevolavafatibegoko.pdfIn PDF document text
    • http://transsnabstroy.com/userfiles/file/74224625421.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/22273582438.pdfIn PDF document text
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/80673609911.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160732c531caa2---37007474378.pdfPDF link annotation
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099071195f82---xalipojekarimibavano.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/kavlfm5ncgsn5kgi743ovmuq42/82993558370.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/palasajenamoto.pdfIn PDF document text
    • https://zenkenmoshi.info/images/files/file/24385067538.pdfIn PDF document text
    • http://ohsclassof73.com/clients/9/9a/9a21b0b253f7c4eafe662346d237c286/File/zadupagigukilazorapinuger.pdfIn PDF document text
    • https://imahima.xyz/js/ckfinder/userfiles/files/tesusuba.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/a8b5de0091d669c4ad14c2dcd1b003b1/7392133244.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/58a204555a0d3ea5f4ceecfc85c833a4/boxuzusukar.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609adb05dfd43---26514006381.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a8525995b2e---22369305505.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/tiwifomiwovudob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=responsible+citizenship+pdfPDF 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_off0000df22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF22 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF739 10700 bytes
SHA-256: 23022468428c5abc5a8205f5dde723fa4f930d9d3370e6e16b481c96253ff1af
font_02_sfnt_off00010f7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F7D 17540 bytes
SHA-256: 0b3959fd716eca9b87483bb05e7bfb02301e41965f0f935180fb106812dec61d

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