Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2cb916ccc168e0c…

MALICIOUS

PDF

61.6 KB Created: 2020-11-14 03:43:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a2df2dd7c3f3fa18fb400e473463b889 SHA-1: 1659f3de11980538e225122f9b1fc55dc93a79f4 SHA-256: c2cb916ccc168e0cf821250545e6a30b3f11b67b6f5382d6da6ee0cebacbc51c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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. 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 0.9996

Heuristics 5

  • 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.
  • 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://trafftec.ru/aws?utm_term=caustic+3+sound+packs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411702/normal_5f9bc9a7666a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391302/normal_5fa17bf1cedb6.pdfIn PDF document text
    • https://daginunus.weebly.com/uploads/1/3/4/5/134597638/kukazimaloza_gufixugudapo_vudaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476434/normal_5fa5060394303.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375340/normal_5f9b1fad1b493.pdfIn PDF document text
    • https://vobudofokivelux.weebly.com/uploads/1/3/4/5/134599261/6437101.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427095/normal_5f9c1f0d3d75f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/gelobakajesas.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/14691715353.pdfIn PDF document text
    • https://s3.amazonaws.com/wisatutadi/cubes_strategy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3624740-b88e-48cd-8cd7-b363c7bd4152/rifaba.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/world_wars_game_full_screen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e33a6c02-c817-446c-b5cd-87356f66691d/bikaxalamomupowokid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/109ab330-389a-44fe-8f78-a10d6514234b/99615316940.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_off0000b3d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3D3 5072 bytes
SHA-256: 93a906a08869ead7141a8bf5b01b867fc94b47f9fcb1b3ce8da8cc723533b545
font_01_sfnt_off0000c525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC525 10576 bytes
SHA-256: 52ec07d667bbef10b3e69d8b147c22e4049615466daa37ea4a261c1c71207906

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