Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a97672d2cad72f7…

MALICIOUS

PDF

80.5 KB Created: 2021-01-05 18:13:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5f370c351a5c08d1bfd5ce8bf6338d02 SHA-1: 7db3cd3b667cbc8a0394593e969ed422dc4cda1c SHA-256: 6a97672d2cad72f79ea63cd3da590976709c7d5f7dfa53e49cb02d50f105dad9
274 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific lure impersonating Chase, directing users to a malicious redirector. The presence of multiple embedded URLs and the ML classifier's high confidence score indicate a phishing attempt. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an intent to lead the user to a credential harvesting page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://lepatoketi.weebly.com/uploads/1/3/4/7/134732542/2a2708834f72.pdf.
  • 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://traffine.ru/123?utm_term=notary+republic+near+me+now In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384167/normal_5fa45a9c2da25.pdfIn PDF document text
    • https://lepatoketi.weebly.com/uploads/1/3/4/7/134732542/2a2708834f72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378623/normal_5fa79b3aaeda6.pdfIn PDF document text
    • https://wulafuxuzezam.weebly.com/uploads/1/3/2/3/132302924/levuwol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445866/normal_5fc653591786e.pdfIn PDF document text
    • https://suzaruluzi.weebly.com/uploads/1/3/4/4/134455671/bexerejugigidek_fizefaneter_bukuna_darazan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416660/normal_5f98d9f7ea85e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418370/normal_5fda5da5ed4c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402252/normal_5fd140bd2655f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388163/normal_5fa1419e86ba2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/debab3d7-49d8-4041-b15e-fc55d535e7b8/garage_floor_resurfacing_companies_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75d3499e-ff82-4acf-a1c9-df53b61ea5ca/muzujinurefasuwula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/980be8b1-ea87-4b82-a630-cd0615a7945d/bukatiwonoviwidetevawiz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000effa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFA 5088 bytes
SHA-256: 71c4a791fe84c01938ad9eb1d9589910439123addffdc3ff6594ff074a133957
font_01_sfnt_off00010140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10140 10976 bytes
SHA-256: 754790f180be670c8623465215dcb34093e381f3dc9cd96242b70921fbeda838
font_02_sfnt_off000126cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126CD 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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