Malicious PDF — malware analysis report

Static analysis result for SHA-256 007fed3195b99b55…

MALICIOUS

PDF

76.1 KB Created: 2021-03-23 10:30:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd22553b1daa3787e1f62c3c752e658c SHA-1: 8002492f32a9796d1f981e285587a0cacea06d48 SHA-256: 007fed3195b99b55c22064a075bb3fba7ee7472456871c192d3b710af37878cf
156 Risk Score

Malware Insights

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

The PDF document, disguised as a guide for threading a sewing machine, contains a large number of embedded external links, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the presence of numerous external links points towards a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/strik?utm_term=how+to+thread+a+vintage+sears+kenmore+sewing+machine
    • https://cdn.sqhk.co/jelasusoved/6Grbmgc/50540382163.pdf
    • https://cdn.sqhk.co/velabolo/RgdGoid/business_administration_definition_wikipedia.pdf
    • http://jewlgems.com/likelafadusilajunr2g8v.pdf
    • https://cdn.sqhk.co/tavaxiwugo/thbSifo/paper_toss_boss_hile_apk.pdf
    • https://cdn.sqhk.co/gewanunu/XaVv1eq/best_historical_romance_books_of_all_time.pdf
    • http://get3creditscores.info/zatuginizolirojnbd74.pdf
    • http://sale-siberian-force.online/xojofelirexolapucdg2.pdf
    • https://cdn.sqhk.co/dejuxafe/6VewPDy/spider_man_is_watching_you_meme.pdf
    • https://cdn.sqhk.co/pujunuzivas/jjjddhj/87032909768.pdf
    • http://freedate18.xyz/pathfinder_dpr_olympicsezqdr.pdf
    • http://smartbright.club/swot_analysis_exampletcn64.pdf
    • http://twoup-viktoria.online/1491599263691glq.pdf
    • https://cdn.sqhk.co/zezaxemepe/fchb4oX/simple_birthday_decoration_ideas_at_home_for_daughter.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/61dccfb9-0ccb-4b68-a2c7-98f33a8e3806/introduction_to_psychology_syllabus_community_college.pdf
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_ced733e364fd41b2950fb2aba8c645c3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/6bbaae15-cbeb-4eb6-84c7-c3e70771bf03/fudenewudu.pdf
    • https://18e99e0c-7034-4a8c-9069-267580a295b8.filesusr.com/ugd/b337f5_e374ab75407c4f62aed3b01d4fc3d46e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/7df2f1c4-dac8-489b-a9ea-176323186872/worogozukefo.pdf
    • https://e2604e0b-f95a-4acb-b53f-a7db3827b2a1.filesusr.com/ugd/225520_1e3e3ce38ab44e8eb999517b4d74dc57.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c6bdcb51-bb2c-4a33-a4e9-cb306e52a2c2/35949044682.pdf
    • https://413f70bc-0247-4a04-a3fc-eabb14e2b93f.filesusr.com/ugd/f18ee6_f2305f0f4ff54634b0c3375408c8066c.pdf?index=true
    • https://8f20b4bd-83f7-4a55-8c6f-e9501e2e061c.filesusr.com/ugd/c1c462_575de835066e46c9b00a7aecb5fe211c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/384946dc-8398-496c-a7c9-2d38f19bbf0f/zumofofamigazelezamijub.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea3c.bin
68538128f234b7b9907d2b0a7a6a44e963c0b154d86bf00572f9ee48fda4bc40		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3C 5496 bytes
font_01_sfnt_off0000fcdb.bin
c65933976cfa019d8662ea0a7eeb9a7189f5c1da6c4b4bb9aabc7a9351aa1bb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDB 11224 bytes

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