Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec6428748f59e238…

MALICIOUS

PDF

80.3 KB Created: 2021-05-23 22:34:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9fdab4b96f1e41b47d91b654abcf6d7c SHA-1: 1054480f887a529f8e564478855ed858f92b245a SHA-256: ec6428748f59e238f6ae3b21de58a4dffdbe747714002e69c60630396f60e2ad
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jumiwimov.ru/strik?utm_term=net+framework+4.5.2+offline+installer+for+windows+7+64+bit+download PDF link annotation
    • https://xurigaguk.weebly.com/uploads/1/3/4/6/134635426/90323e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469143/normal_5fee928398547.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495050/normal_60059c29c6e1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374521/normal_5fdc658335edb.pdfIn PDF document text
    • https://vegofifujudiw.weebly.com/uploads/1/3/4/5/134501805/f83c6.pdfIn PDF document text
    • https://fivixevovisobav.weebly.com/uploads/1/3/1/3/131380347/tolukus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416506/normal_6018da6ed08a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471996/normal_601b9b2c17dc6.pdfIn PDF document text
    • https://letazofuwukuge.weebly.com/uploads/1/3/4/8/134869061/bisipe_tafugig.pdfIn PDF document text
    • https://fegejakir.weebly.com/uploads/1/3/5/2/135299458/56f971ba17ad2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501965/normal_5fdfb1fa513a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494436/normal_601d965aa0a09.pdfIn PDF document text
    • https://podonajoji.weebly.com/uploads/1/3/1/4/131438761/bf0e60f5.pdfIn PDF document text
    • https://bomoturu.weebly.com/uploads/1/3/1/3/131384468/vadud_pipafu_vosafojijexal.pdfIn PDF document text
    • https://vitukotegow.weebly.com/uploads/1/3/0/7/130775282/7572e416555.pdfIn PDF document text
    • https://pubegole.weebly.com/uploads/1/3/0/7/130739090/54c9d1f.pdfIn PDF document text
    • https://doxujivadew.weebly.com/uploads/1/3/4/8/134875716/1763092.pdfIn PDF document text
    • https://razejegunejedad.weebly.com/uploads/1/3/1/6/131636834/pisowilid-mopunibegedi.pdfIn PDF document text
    • https://memefuzagimo.weebly.com/uploads/1/3/4/6/134612336/2627224.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/dinisemowoge/14911050128.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/bollywood_new_movie_free_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/basisixijigobaruvodupo.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/arabya_rajani_audio_story.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/call_blocker_pro_apk_onhax.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_off0000f867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF867 5928 bytes
SHA-256: bd21ccccef6e804379e231f98c9ca7a1e7338ad5841d200db39779159787dfb5
font_01_sfnt_off00010cb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB4 11124 bytes
SHA-256: db4e8ea52e79a52bc1b7e0526a563c90519f3dc1e4950f3338a4f7ac18759df4

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