Malicious PDF — malware analysis report

Static analysis result for SHA-256 193502d5c69e3a57…

MALICIOUS

PDF

88.4 KB Created: 2021-06-07 23:33:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 6548a880ea92741615562c430ece9fa2 SHA-1: 90353dd911ad163ffacfa9d4de7612ad4cacdd31 SHA-256: 193502d5c69e3a578ff8e4eb6ef211f73c8187ec8da32074809fa3cb9145c0e1
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content or lead to phishing sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

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.
  • 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://garglob.ru/pbw?utm_term=the+jungle+upton+sinclair+worksheet+pdf+answer+key PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459319/normal_5feaef9b7b5bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479688/normal_6011830d62ecf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447253/normal_601fafecca817.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492275/normal_602fb06acf582.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413011/normal_6007ff36972e2.pdfIn PDF document text
    • https://fotovotujipibar.weebly.com/uploads/1/3/4/2/134267097/suwezogaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384839/normal_6046e11c71062.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366055/normal_5fcc7ad5f285f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465707/normal_601459ff165e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369632/normal_6014d6d91d3f1.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4411921/normal_60b5608f86a33.pdfIn PDF document text
    • https://dikosunasalimob.weebly.com/uploads/1/3/4/3/134363034/be13fcad3a86b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391015/normal_6005871e3a14f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vefubop.pbworks.com/f/62007813173.pdfIn PDF document text
    • http://kipizasuzeda.pbworks.com/f/59991445059.pdfIn PDF document text
    • http://zikupuzajix.pbworks.com/f/20497912378.pdfIn PDF document text
    • http://zevatirupura.pbworks.com/w/file/fetch/144625797/prime_number_divisible_by_720.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_off00011c0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C0B 5700 bytes
SHA-256: 8358c1c0f2bff3aff2ef04cc8ec75269c44480dd1de76d7bb96ebeedec19cbfd
font_01_sfnt_off00012f90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F90 10636 bytes
SHA-256: 30e6e60dc11ba26be6ca903fa16cae3eab87907d32af2b153011e4861b7191dd

Open this report in the interactive analyzer, or submit your own file for analysis.