Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b75cc6338671021…

MALICIOUS

PDF

70.9 KB Created: 2021-02-10 20:52:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 834cc2cb745a817d2d4278c9b7620aac SHA-1: 9a74a06030a8d2d1c6e60e9050ccd885851baa41 SHA-256: 7b75cc633867102121e0d33539cd3cbf673b6bfb88a8ec8bfb56af0a9fa8b087
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The primary URL, 'https://maypoin.ru/123?utm_term=stove+bright+paint+charcoal', suggests a potential phishing or content-scraping attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification. No scripts were extracted, but the structure indicates a malicious document designed to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/123?utm_term=stove+bright+paint+charcoal PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4424692/normal_5fe2b7c7b5e8f.pdfIn PDF document text
    • https://suguturame.weebly.com/uploads/1/3/1/4/131438741/wonotanupefegi.pdfIn PDF document text
    • https://wugovaxovagebi.weebly.com/uploads/1/3/0/9/130969592/peruwenimi-vetubogobukan-sizenazalajaxi.pdfIn PDF document text
    • https://kofaxikizija.weebly.com/uploads/1/3/4/3/134336932/8100173.pdfIn PDF document text
    • http://small-italy.space/23280190583io8fo.pdfIn PDF document text
    • http://card2card.live/num_lock_caps_lock_indicator6z5rw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449402/normal_5fe169c39476d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380694/normal_5ff0b77a5cbd6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404990/normal_5feb0b208aa89.pdfIn PDF document text
    • http://demask.fun/mufivd03m0.pdfIn PDF document text
    • http://callup.today/nail_biting_emoji_androidonr1v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_601a9fad3e8de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405467/normal_5ff1d11942135.pdfIn PDF document text
    • https://pimazapodozem.weebly.com/uploads/1/3/2/8/132814260/9019396.pdfIn PDF document text
    • https://xipejefokodidub.weebly.com/uploads/1/3/4/6/134612454/fa04327baad55f.pdfIn PDF document text
    • https://duzetokip.weebly.com/uploads/1/3/4/4/134404829/4ff4a4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499319/normal_6009ff1bbe779.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/leniviwinabakipuxodalila.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/lazotu.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/green_bay_packer_game_day_information.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/zanukowozorujajonumafuz.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD958 5320 bytes
SHA-256: f58695b5161ca8b02ad6ac73c2865363525272a981a2eb0155904b461e147227
font_01_sfnt_off0000eb72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB72 10244 bytes
SHA-256: 22380ebf5ca8b4c517a890a455e9a3a168790a1259bb3cc0869743237929dd0d

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