Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfce619a413f0c39…

MALICIOUS

PDF

109.6 KB Created: 2020-11-17 17:10:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 8251419ed4c20f5c14dbcfc028972528 SHA-1: 9ebd48b488ddbe77480b20fe4a415140484253cc SHA-256: dfce619a413f0c39ec9705b15f31485944072acf7f3f4d188ec5038dcf35ac36
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, indicating a link farm or redirection scheme. The presence of 'cmd.pdf' and external URLs suggests an attempt to execute commands or redirect the user to malicious sites, potentially for phishing or malware distribution. No scripts were extracted, but the overall structure points to a malicious document designed to lead users to external resources.

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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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=frost+mage+pve+guide+tbc PDF link annotation
    • https://pirowefe.weebly.com/uploads/1/3/4/4/134444143/mumagipawi-nonaxuvugix-pixujolonu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426810/normal_5fa4fbcd4c49a.pdfIn PDF document text
    • https://gokajafiwewafij.weebly.com/uploads/1/3/4/3/134314986/vusuremoda-poberi-dadame.pdfIn PDF document text
    • https://fidegobopoj.weebly.com/uploads/1/3/2/8/132815019/59181733d4337.pdfIn PDF document text
    • https://gesunujas.weebly.com/uploads/1/3/4/5/134509411/4269818.pdfIn PDF document text
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/0434f8.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/mekonulegipero/fodipesavemesa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/060e1920-c467-4fa4-971d-f919340bfacc/46484655010.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2004b980-6766-4931-a7e8-2bb922b323b8/pockie_ninja_2_private_server.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/descendants_2_full_script.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/mirosomagejekamikabule.pdfIn PDF document text
    • https://s3.amazonaws.com/befevifa/how_to_change_office_2013_product_key_cmd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab427417-8da8-4314-897f-62a2636913cc/86938233824.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/nutopevikubiduboj.pdfIn macro / runtime command snippet
    • 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
    • https://uploads.strikinglycdn.com/files/ab427417-8daIn macro / runtime command snippet
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016e88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E88 5516 bytes
SHA-256: 546a31a96366099858259ac79e4c8cff59dc5ee7a15adda1deb3e73e80586efe
font_01_sfnt_off00018139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18139 11272 bytes
SHA-256: 0d3471dccf2b1db1a674248af03e30947a3983d1a233cff6e38398741fd1d807

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