Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce781262822a3df8…

MALICIOUS

PDF

84.5 KB Created: 2020-12-28 00:14:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4891784d0071a861a479106f4f2e0212 SHA-1: e740c80aae0cc8f984ac3dd129de62b031e6dcfc SHA-256: ce781262822a3df8446dad2727ce477bee6de3a3caaba1fc08ebf071e7aa7a77
214 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to potentially malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that appears to be a lure for search engine optimization, directing users to a malicious URL. The presence of a PDF redirector link and a link farm heuristic strongly suggests a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/123?utm_term=tim+duncan+wife+name In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366639/normal_5fd0e700173e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420028/normal_5f970c9bcd338.pdfIn PDF document text
    • https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/pulira-zikesirul-jewalemow-gijaxipozilofe.pdfIn PDF document text
    • https://cdn.sqhk.co/kalijada/PgcDShb/vefuni.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/gonima/braille_academic_reading_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/unblock_boxhead_hacked.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/influencer_approach_template.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/5131557912.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/dizegulavelu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d23e5682-848f-43fe-a241-f7c4bf7e3d01/14289334676.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2581f71c-024e-4229-8b0e-432f7ffe6698/11976108674.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/872262f3-25e2-4d2a-9160-345402629fe3/vifujijix.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/english_font_style.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/57177521899.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_off00010f52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F52 4904 bytes
SHA-256: a8576edc4e66c08a547d7b2995e7666e9f5f4c27dd10a5c892d44947d2299293
font_01_sfnt_off00012007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12007 10952 bytes
SHA-256: cf05ded8219aff44a42286ab6e6d1f2aeeb578e7b376fd8bd0333d53397188c3

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