Malicious PDF — malware analysis report

Static analysis result for SHA-256 127cd9b9bfae73c0…

MALICIOUS

PDF

73.3 KB Created: 2021-06-10 02:15:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4980b65a43be7f493e205757f33105d2 SHA-1: 6a264c0ece829025dbd4032ce387445a105e1c6f SHA-256: 127cd9b9bfae73c08a95471f7fdc96b9837674a5a7d1a47085a9e49a248acaae
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. The PDF contains a large number of external links, suggesting a link farm designed to redirect users to malicious sites or download further payloads. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly support a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://synerhu.ru/pbw?utm_term=granny+mod+download+pc
    • https://cdn-cms.f-static.net/uploads/4389599/normal_601d6904a5b74.pdf
    • https://nabumeludofava.weebly.com/uploads/1/3/4/3/134373896/bigeb.pdf
    • https://static.s123-cdn-static.com/uploads/4413126/normal_5fc5ae80a5de7.pdf
    • https://cdn-cms.f-static.net/uploads/4456420/normal_602b472d3576e.pdf
    • https://cdn-cms.f-static.net/uploads/4417530/normal_606aa5bc5e905.pdf
    • https://static.s123-cdn-static-d.com/uploads/4493873/normal_60b262613060e.pdf
    • https://cdn-cms.f-static.net/uploads/4383915/normal_60bbf11233aab.pdf
    • https://cdn-cms.f-static.net/uploads/4454550/normal_606ad70327a3f.pdf
    • https://duzopotubesafes.weebly.com/uploads/1/3/4/8/134890215/wepare_kenitu.pdf
    • https://mogunugive.weebly.com/uploads/1/3/4/3/134381007/8838134.pdf
    • https://cdn-cms.f-static.net/uploads/4417664/normal_60b8740fef72d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0e43bd40-d256-4817-ab5d-2208f55959ef/partituras_cantos_coro_lldm.pdf
    • https://uploads.strikinglycdn.com/files/84017128-2c18-4dc1-a577-bd8d2af1f089/individual_development_plan_examples_ppt.pdf
    • https://uploads.strikinglycdn.com/files/51f68d92-6f9f-40ba-a30c-acf156eafade/78651423090.pdf
    • https://uploads.strikinglycdn.com/files/a0787c86-f3a8-4411-aec2-1e81d6eb6cc5/58108396105.pdf
    • https://uploads.strikinglycdn.com/files/7c516747-5751-4c10-adc6-c42342ab2d02/20973430038.pdf
    • https://uploads.strikinglycdn.com/files/5680a4e5-b741-44c9-aa41-427b1f39043f/35022852228.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e16a.bin
a0ced2f3d4f82997e680eb705dad79985b0c639cb673956e616f9eaa3361c66b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE16A 5264 bytes
font_01_sfnt_off0000f359.bin
611edccb101a886a0c709b5083327515b00cc92d099435e88c7029a738410b2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF359 10840 bytes

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