Malicious PDF — malware analysis report

Static analysis result for SHA-256 807e00cf71f5f682…

MALICIOUS

PDF

70.3 KB Created: 2021-05-30 20:12:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f0aeb24be68b49d3e65432ab3568aec6 SHA-1: f68b20de22c994a12961bf32dec10af1733bb9f8 SHA-256: 807e00cf71f5f682602cc2c9e54021edc5547dd624e5a8f960f3ed4ea93a09fb
246 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses brand-impersonation credential phishing. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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://lexobazotukagof.weebly.com/uploads/1/3/1/4/131407042/logibivowivop-bowavilopavage-dajoja.pdf.
  • 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://seumenha.ru/strik?utm_term=1970+mustang+assembly+manual+pdf PDF link annotation
    • https://lexobazotukagof.weebly.com/uploads/1/3/1/4/131407042/logibivowivop-bowavilopavage-dajoja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465705/normal_60371becdb1f8.pdfIn PDF document text
    • https://pobanuruwogijo.weebly.com/uploads/1/3/4/8/134882751/7240193.pdfIn PDF document text
    • https://rawubewo.weebly.com/uploads/1/3/1/4/131405976/2496121.pdfIn PDF document text
    • https://berovifis.weebly.com/uploads/1/3/4/7/134730871/xirovinodeluke.pdfIn PDF document text
    • https://zedaluridafam.weebly.com/uploads/1/3/4/4/134464222/2722014.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493905/normal_604b100a37ced.pdfIn PDF document text
    • https://kemizanina.weebly.com/uploads/1/3/0/7/130738765/5988145.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479236/normal_5ff4e28762f58.pdfIn PDF document text
    • https://xasewaverafi.weebly.com/uploads/1/3/4/8/134868265/sodonugajilofe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447253/normal_60312f078994b.pdfIn PDF document text
    • https://bewimowijukoja.weebly.com/uploads/1/3/4/5/134584545/8389e0ba.pdfIn PDF document text
    • https://lerorenoj.weebly.com/uploads/1/3/5/3/135390996/48adcffa22.pdfIn PDF document text
    • https://foniliwis.weebly.com/uploads/1/3/2/6/132695455/2960677.pdfIn PDF document text
    • https://fojomifurinu.weebly.com/uploads/1/3/1/3/131378835/2041846.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377401/normal_605bbc11a4933.pdfIn PDF document text
    • https://fumasidabufip.weebly.com/uploads/1/3/0/7/130775820/jizaw_mojazaxinixu.pdfIn PDF document text
    • https://difodofixipa.weebly.com/uploads/1/3/0/8/130814112/77036.pdfIn PDF document text
    • https://morisoxurekes.weebly.com/uploads/1/3/4/4/134464458/7503e8ef972d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385206/normal_60678428c928b.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/3354b7ed-5007-47fc-8446-8019c80829d1/statistics_and_probability_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3a71a71-8332-4cd4-b0e5-24497b402799/how_do_you_write_an_investigation_report_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9edf32c4-2d4c-4a2b-9c34-cd8077bb8ce4/hard-news_leads_also_are_called.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbb037ab-6bd6-4e2f-a742-ec1cde32fc82/zilabexafopuli.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_off0000d445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD445 5840 bytes
SHA-256: ec2b991cc05353b68a10e2bc9d556f83b58f3951c960119fb64cae314a38b6d9
font_01_sfnt_off0000e826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE826 10488 bytes
SHA-256: fcb48b27bfb8c342491fbc79e96089926514b27eebf72444a2fa18394750dcde