Malicious PDF — malware analysis report

Static analysis result for SHA-256 814c278641112aa3…

MALICIOUS

PDF

83.4 KB Created: 2021-03-17 19:44:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5c81df9e0a650affbb18a0611ff2a4df SHA-1: 780e2ed242b35f3a0ea1eaebd8f4b30337348bf5 SHA-256: 814c278641112aa3b585fb16f887e6354e9986fc5c2115f665fee6f38fb09cfc
126 Risk Score

Malware Insights

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

The PDF document is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. The document body, though heavily obfuscated, suggests a lure related to a GE oven manual. Numerous embedded URLs point to disposable hosting, likely serving as a link farm to distribute further malicious content or phishing pages.

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://jottigo.ru/wix?keyword=ge+profile+dual+fuel+convection+double+oven+manual PDF link annotation
    • https://cdn.sqhk.co/livejizilul/jgmhaif/answers_for_interview_questions_admin.pdfIn PDF document text
    • https://cdn.sqhk.co/rojozedofaf/haiijcJ/96881112172.pdfIn PDF document text
    • https://cdn.sqhk.co/nukusigemug/iigj8jj/stronghold_a_hero_s_fate_mod_apk_wendgames.pdfIn PDF document text
    • https://cdn.sqhk.co/papebikuwi/icYiA2q/lezokigubug.pdfIn PDF document text
    • https://cdn.sqhk.co/vomofizog/diejbha/wesarevikumabose.pdfIn PDF document text
    • http://dusikazo.mypressonline.com/alzheimer_fisiopatologia_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/dixejetafap/GATXjaE/dudolazum.pdfIn PDF document text
    • https://cdn.sqhk.co/dalogunutixo/Xcfihda/red_sun_tattoo_meaning_korean.pdfIn PDF document text
    • https://cdn.sqhk.co/kerosumumato/c9RjaZF/change_my_voice_to_american_app.pdfIn PDF document text
    • http://rewidixuwilakiw.22web.org/7368158471.pdfIn PDF document text
    • http://nudawofafakab.22web.org/senusajolimuzaten.pdfIn PDF document text
    • https://cdn.sqhk.co/fusojafiza/hhHS8jh/towukavebuli.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/wovisak/kamozex.pdfIn PDF document text
    • http://lamupimifuban.onlinewebshop.net/powerlite_home_cinema_1040_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/25338686519.pdfIn PDF document text
    • http://sodowurivav.onlinewebshop.net/88747092358.pdfIn PDF document text
    • http://rupiroliwon.epizy.com/jazagugopizuwe.pdfIn PDF document text
    • http://batevawave.epizy.com/11345919395.pdfIn PDF document text
    • http://pakidenekarudi.epizy.com/tazesujazigalikogarakezuz.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_off000108d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D3 5356 bytes
SHA-256: 45a28a48947295c158ab6796e22f5f955139559f7deade6e503b8f1cc4b80f58
font_01_sfnt_off00011af6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF6 10960 bytes
SHA-256: ea8b7d67cc7a1d5435ad43e44a20b48978d451319035bfb8b2acd9bcca1f96fd

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