Malicious PDF — malware analysis report

Static analysis result for SHA-256 02f530756657cd71…

MALICIOUS

PDF

75.3 KB Created: 2021-02-01 18:58:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: fbab1016f0d678725ee328aba5894929 SHA-1: 02e3e6401a75f74da9ab389db0f3017b0a6278c4 SHA-256: 02f530756657cd715181c7bbecd1f1e38112bd79711a2047d085a0e7987deefd
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to deliver malicious content or redirect users to malicious sites.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/123?utm_term=how+many+kailash+mountains+are+there PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4373519/normal_5fcb10b1ac1b4.pdfIn PDF document text
    • http://nibelv.xyz/maxovisuzojomutidofadegebwy64.pdfIn PDF document text
    • https://polovetanofup.weebly.com/uploads/1/3/5/3/135330247/fojizosolumit-nugutapo.pdfIn PDF document text
    • https://sakotitalivuvu.weebly.com/uploads/1/3/4/8/134887700/zibuwekusumefimoliwo.pdfIn PDF document text
    • http://bettyloustintruckbbq.com/english_song_shape_of_you_download_mp3_directbj65p.pdfIn PDF document text
    • http://gododerur.66ghz.com/wewotapijiwel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411681/normal_5fc73813aaf19.pdfIn PDF document text
    • http://italdom.fun/rulelamukp9c7h.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/6xhapmc/rise_of_empires_ice_and_fire_pc_download.pdfIn PDF document text
    • http://tk-time.site/83953397613adqxd.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxafopagad/2ib6tjh/birilirivujoke.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://punegejofuj.epizy.com/seamless_transitions_pack_free.pdfIn PDF document text
    • http://loxototo.epizy.com/edersheim_bible_history.pdfIn PDF document text
    • http://lesasesodimavun.epizy.com/24360637731.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_off0000e934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE934 5144 bytes
SHA-256: 2d77a82c6fca4496947806ff5ca7e0653fd5fe5bd513b75fbbbfdcf49710e71b
font_01_sfnt_off0000fa98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA98 10936 bytes
SHA-256: a3db878cc81c17236c588104f8e74474e217829596b30620f0e162c88602b3b4

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