Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c2f79f3e3f36856…

MALICIOUS

PDF

90.3 KB Created: 2021-07-31 10:36:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 85a37dab1ad152a3f20943caf7e674ee SHA-1: 743886f2e2fabbe6db5b40e6285ee62ed9a0d219 SHA-256: 1c2f79f3e3f3685607c9aa495ba758e99cca660e1245bb1f16f7816fb18fd33c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, detecting it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The primary purpose seems to be redirecting users to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://catamma.ru/uplcv?utm_term=top+financial+statement+analysis+books PDF link annotation
    • http://learnazia.com/fck/imagesfile/jewoxuvirotebapove.pdfIn PDF document text
    • https://shellserva.nl/docs/Image/file/rukudizalojid.pdfIn PDF document text
    • http://tcsm62.org/uploads/news/file/vutawikefatapomen.pdfIn PDF document text
    • http://ballstonfamilymedicine.com/clients/861402/File/mesisebina.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/56e5e31ea863b918834e463f94648f07/91739882243.pdfIn PDF document text
    • http://wearefamily1234.com/clients/3/31/31b46d3307e4516335aa88350909469c/File/19193451483.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e39002e378---dulodi.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0dcf22e25---70351699804.pdfIn PDF document text
    • http://jirehenl.com/userfiles/file/151722369765.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/6d3acd1a8ca56a997ebc407792d49228/ralezanajewibute.pdfIn PDF document text
    • https://icoachyou.biz/images/ckeditor/files/83362897587.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/0a2ev30mop59ena53jat8gajcv/92554034421.pdfIn PDF document text
    • https://grup-insaat.com/userfiles/file/fuvirekoxolegox.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/59221765550.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160820d641cc40---pemotapuxuvokanupulajuve.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/til848hne3per7glimmr8ga2ja/66666448483.pdfIn PDF document text
    • http://parquessolaresdenavarra.com/userfiles/files/13630382491.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160ba9503553c1---71434171292.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/655e00ab76b81f81c6b4c2691d059718/kidoperovam.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/84f2d7f8f659151ea80d39e8730dd062/woxivibalimazisubiru.pdfIn PDF document text
    • http://outspokenholland.com/userfiles/fckFile/20210601125951.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/60631564848.pdfIn PDF document text
    • https://campermagazine.tv/public/file/rejudititofupolakebat.pdfIn PDF document text
    • https://metricgroup.it/uploads/file/wigugupipapebewumeboviw.pdfIn PDF document text
    • http://abwmarlboropike.com/uploads/files/7513249651.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160741fdb211fc---29202852780.pdfIn PDF document text
    • 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_off0000fe7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7A 16796 bytes
SHA-256: 8fd854ba7583499f9b3d2ee8046a8bc4ed5346d6930c720d301f633feb97ff9d
font_01_sfnt_off00012a62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A62 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14279 10852 bytes
SHA-256: 15f31c47d269d469648eade44f53f31b4f01e19066ee8d01baced135fced73b2

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