Malicious PDF — malware analysis report

Static analysis result for SHA-256 65b0c744eaacd313…

MALICIOUS

PDF

74.8 KB Created: 2021-02-17 07:36:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: d34c79f854e050bee498c59182f9cc98 SHA-1: 3bd7f5b12fa5fa9db6de151a95cf09e1256e4c47 SHA-256: 65b0c744eaacd3135f0a9313d1fcda27894a612f0b64e4e860558feca938ed15
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URLs are likely used to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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/strik?utm_term=using+camera+lucida+for+cookies PDF link annotation
    • https://fefodenajefive.weebly.com/uploads/1/3/1/4/131437461/6938527.pdfIn PDF document text
    • https://wawanuxofidote.weebly.com/uploads/1/3/0/7/130775818/tidise.pdfIn PDF document text
    • https://cdn.sqhk.co/tosilura/pQhjhLc/pencilmation_3_coloring_book.pdfIn PDF document text
    • https://cdn.sqhk.co/dawafawux/zBhchcu/offline_rpg_games_for_mac.pdfIn PDF document text
    • https://fabebebu.weebly.com/uploads/1/3/2/7/132740756/8c5fbbb9765f.pdfIn PDF document text
    • https://cdn.sqhk.co/tosilura/qhcC9nT/flip_skater_hack_mod_apk_download.pdfIn PDF document text
    • https://jujivonigipegi.weebly.com/uploads/1/3/1/4/131453429/kubilitigulikitu.pdfIn PDF document text
    • https://kezagoguz.weebly.com/uploads/1/3/4/1/134131769/mujeguni.pdfIn PDF document text
    • https://cdn.sqhk.co/taxeseta/gjkF73b/26490469810.pdfIn PDF document text
    • http://abanca-electronica.com/642180716qpkgg.pdfIn PDF document text
    • https://tulivugid.weebly.com/uploads/1/3/4/6/134607321/5682612.pdfIn PDF document text
    • https://cdn.sqhk.co/zaliroded/gdghgjy/69616965972.pdfIn PDF document text
    • https://seporarutigofu.weebly.com/uploads/1/3/2/7/132741198/9307328.pdfIn PDF document text
    • https://cdn.sqhk.co/zibomevuguli/o10Dchi/light_up_jump_rope_wholesale.pdfIn PDF document text
    • https://marizezibafive.weebly.com/uploads/1/3/4/8/134865590/589e05e.pdfIn PDF document text
    • https://cdn.sqhk.co/suxunuke/druieWk/twitter_coin_master_tiradas_gratis_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/gijesali/gichefb/war_and_order_tips_for_beginners.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE827 5396 bytes
SHA-256: 3e55deab48bb8b19443a565123d43e70e857449452bbc9f140792baea0673cbe
font_01_sfnt_off0000fa73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA73 10520 bytes
SHA-256: 77b83f9d3ec4c60488b476d689ae8b7b2db848046327225c2b603c4ac19ed78a

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