Malicious PDF — malware analysis report

Static analysis result for SHA-256 35b93187590838ba…

MALICIOUS

PDF

77.8 KB Created: 2020-12-22 04:08:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6a177a3a1af9aa22569c6cde5ed8a1eb SHA-1: 9440c3b113cb6b8329d3e8cd145a3fb3985cb6b3 SHA-256: 35b93187590838bafdda9a17397b48a56faff31544336937dba420ee5f8840be
216 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains heuristics indicating it is a credential phishing lure impersonating UPS, and it also contains a link farm with multiple external URLs. The presence of a link to a known redirector and the ML classifier output strongly suggest malicious intent. The document body, though heavily obfuscated, contains text related to 'Free robux' which aligns with common phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://tesokumerapaj.weebly.com/uploads/1/3/4/5/134522001/jodararumadepof_tumuwubopeza.pdf.
  • 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://traffine.ru/123?utm_term=free+robux+no+human+verification+2016 PDF link annotation
    • https://tesokumerapaj.weebly.com/uploads/1/3/4/5/134522001/jodararumadepof_tumuwubopeza.pdfIn PDF document text
    • https://xukoxaxap.weebly.com/uploads/1/3/4/7/134748194/d04fc2fb8f.pdfIn PDF document text
    • https://tedumuwoke.weebly.com/uploads/1/3/1/3/131397970/dbd7dfa4d11.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f244ec30-e437-4918-821f-077b676bdf69/2710750826.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14114859-fd32-4b4f-9189-dbf616e53cd5/30773695576.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/anemia_makrositik_adalah.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95c3c527-c195-488c-850d-b72f6e3f4393/bloomington_jefferson_high_school_principal.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7828bd8e4f44799675b34/t/5fcf9908caa95a391e73f66b/1607440648880/man_or_vampire_game_review.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd2c3cb0b7d26d496ab432/t/5fde71810f6c913d44eff99c/1608413572442/kenya_law_reports_cause_list_kiambu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8238d24d-bfda-41e0-919b-0bff6c86aed4/47698495893.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/jikareponu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f02d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02D 5612 bytes
SHA-256: c6883df79cd2dadc5c1eeee38e0746017f57a3a95098790060de9a4708be0c90
font_01_sfnt_off0001032e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032E 11472 bytes
SHA-256: bd01b56b8a1068a50ca2840d045e8a46e537165e3a4843e7e06b7ff24ceee05f

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