Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd269a0eacd90f20…

MALICIOUS

PDF

72.9 KB Created: 2021-01-23 21:33:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 189a0904409f20ac2d47a01a4fbb3e28 SHA-1: 8495056920e34af3a73fe1017d1574f6b4dd5d19 SHA-256: cd269a0eacd90f209f08d7f39e432037719c158d895231de5f281df444c26890
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic, suggesting a phishing or malicious content distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the presence of numerous external URLs points towards a likely attempt to redirect the user to malicious sites, possibly for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffi.ru/123?utm_term=diablo+2+lord+of+destruction+patch+1.13 PDF link annotation
    • https://cdn.sqhk.co/nivatasob/kigjcnd/idle_space_tycoon_hack_apk.pdfIn PDF document text
    • http://miwodenexiz.iblogger.org/batman_movie_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/wevafofed/6YfdnmL/vuwasibolat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373004/normal_5ffc4bbc3918d.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/iagdjeO/blooming_flowers_merge_flowers_idle_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387412/normal_5feb60bff162e.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/hjiehjP/38943938003.pdfIn PDF document text
    • https://romadixisom.weebly.com/uploads/1/3/2/6/132681692/xosanowikabumugidima.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454673/normal_5feb953d5b7df.pdfIn PDF document text
    • http://pupofikavize.iblogger.org/82397127110.pdfIn PDF document text
    • https://cdn.sqhk.co/vasegodesazu/zjfvnhc/74981991314.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://panadokopejed.epizy.com/dalojivobipemikoxab.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/yorick_guide_pro_builds.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/44016048850.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/vadebemaxodepopilurukiw.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_off0000ddea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEA 5764 bytes
SHA-256: c8851654e6add2b0bfba05819ad7f2e7f88b22e68106d09068fe56f7add5be1f
font_01_sfnt_off0000f191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF191 11196 bytes
SHA-256: c666c91e5ae99723e3312627059d6855b7360ff2dd015b79f30e943b74739399

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