Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f46405b95057ce3…

MALICIOUS

PDF

68.8 KB Created: 2021-01-17 12:50:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: ca01ddfeb58aaf0bd4240f02c17bc160 SHA-1: 23c65719f59cb06153084102bcfa01ac711d7b87 SHA-256: 3f46405b95057ce3c6ef9442fdb8e7759a5976dda489790ff03a789d51099ba0
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by multiple heuristics, including ClamAV and an ML classifier, and contains a large number of external links. The presence of external URIs and a link farm suggests an attempt to redirect users to potentially malicious or SEO-manipulated content. While no scripts were explicitly extracted, the PDF format can embed JavaScript, and the overall structure points towards a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=hades+kerbecs+hasbro PDF link annotation
    • http://fewomazojuxed.iblogger.org/reliability_engineering_e_balagurusamy.pdfIn PDF document text
    • https://xuvuluvibes.weebly.com/uploads/1/3/4/4/134494650/4752757.pdfIn PDF document text
    • https://lotuwuwobegeze.weebly.com/uploads/1/3/4/4/134476082/84332687.pdfIn PDF document text
    • https://cdn.sqhk.co/rogapakaler/tUvWwhh/nojimolim.pdfIn PDF document text
    • https://siputewebototab.weebly.com/uploads/1/3/4/4/134480832/fiwuviri.pdfIn PDF document text
    • https://site-1173632.mozfiles.com/files/1173632/38366640634.pdfIn PDF document text
    • https://cdn.sqhk.co/nedovipirumu/ejjichg/vawifuluvixutek.pdfIn PDF document text
    • https://cdn.sqhk.co/kotoweraga/gg9jdjb/minecraft_story_mode_switch_eshop.pdfIn PDF document text
    • https://cdn.sqhk.co/furafurume/ijTYifU/xulamijen.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/HtibhiO/gotefafadovevogupowow.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/mozirolinitaje/fegize.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/183186776.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/34187915895.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/zakofavupasirarire.pdfIn PDF document text
    • https://s3.amazonaws.com/rekibedafowow/javelin_bipod_sling.pdfIn PDF document text
    • http://furugavasipif.epizy.com/27874635708.pdfIn PDF document text
    • https://s3.amazonaws.com/gekojulog/broken_heart_english_status_video.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/best_nintendo_ds_rom_site.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/98405123373.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3E3 3852 bytes
SHA-256: 47156c1b5d46129667e07efe77f17718b691911377b88512bfd58952c113fe4a
font_01_sfnt_off0000d18f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD18F 5160 bytes
SHA-256: 3309a9bfc3756d7c9b551f02c1412582ac6af8be960bb044f00d297db1c86c22
font_02_sfnt_off0000e310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE310 10172 bytes
SHA-256: e4289576f52e7f77038afa1fa5bff3b412def869f07d8c6c4b8d136ded98a899

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