Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cc9107428917f7d…

MALICIOUS

PDF

69.4 KB Created: 2020-11-18 03:46:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 390e0fce472d6d8c046e34cbd16210a8 SHA-1: c1fbdcacfa2258141197bb5e2f592e0a1edec012 SHA-256: 0cc9107428917f7d337e6f35499aedd15fadca1dca9a469940a4bbef30da18d7
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious or spammy domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful content.

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://traffking.ru/123?utm_term=apogee+channel+guide
    • https://sagolofuba.weebly.com/uploads/1/3/4/8/134873879/lafukosevafag.pdf
    • https://tiwilofudux.weebly.com/uploads/1/3/1/6/131606348/refod-jelugotekon-xunagogudof.pdf
    • https://cdn-cms.f-static.net/uploads/4382958/normal_5f99c40a92879.pdf
    • https://pudiwozi.weebly.com/uploads/1/3/4/5/134510484/8541238.pdf
    • https://cdn-cms.f-static.net/uploads/4365553/normal_5f8b5b6fb8d88.pdf
    • https://cdn-cms.f-static.net/uploads/4376874/normal_5f8dc3a046442.pdf
    • https://bawidonawasaz.weebly.com/uploads/1/3/4/3/134354070/kiximixok_jodolofevivabum_mitokaxaxuvegag.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/06c5eb5e-60b6-4874-92ea-ca8a44771055/memoria_a_corto_plazo.pdf
    • https://s3.amazonaws.com/mubefula/fawixeturebemagug.pdf
    • https://uploads.strikinglycdn.com/files/5805dafb-302c-4179-ab75-24bdc1b3b84e/kpop_wallpaper_desktop_bts.pdf
    • https://uploads.strikinglycdn.com/files/53b1db11-309e-4b84-8727-d8d883acafb3/76431201331.pdf
    • https://uploads.strikinglycdn.com/files/a61e27c0-e4f4-4c4e-aa30-a401c34b44f0/61163725467.pdf
    • https://uploads.strikinglycdn.com/files/255e254b-8e02-4c26-9020-a8926b3221d4/tebofifubexepeko.pdf
    • https://uploads.strikinglycdn.com/files/47152264-41f1-4394-907d-fde4fbace955/63290989127.pdf
    • https://s3.amazonaws.com/zerejibixupav/japarimupuvuzinafixolixe.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_off0000d11d.bin
7a6e14eebe8fe265a12533e69e4d4a56eb06ca5fca26bd8977b18ddac2d3699c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD11D 5048 bytes
font_01_sfnt_off0000e250.bin
53f5f07f440783aaacfa60538d19344cb642c0bae07da8a39e0859a455757516
pdf-font-stream PDF embedded font (sfnt) at offset 0xE250 11664 bytes