Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dad69350068c351…

MALICIOUS

PDF

80.4 KB Created: 2021-03-28 01:30:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a05c5f84902472a8b85c95dfb3a3353 SHA-1: 7d21903e7be02da497c970e160a14c301b40f346 SHA-256: 0dad69350068c35198fc8a489b01ee2ce5d308c6f8e2f751c157bc358d83f3fc
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO abuse tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/wix?keyword=idylis+air+conditioner+manual
    • https://cdn.sqhk.co/bofotabi/qHNgetK/full_charge_bookkeeper_resume_template.pdf
    • https://cdn.sqhk.co/pomorezolo/zR21yii/gagelidamavitakaka.pdf
    • https://lovilubavovujag.weebly.com/uploads/1/3/4/6/134664731/jonoganumokibiloxad.pdf
    • https://static.s123-cdn-static.com/uploads/4457318/normal_5feecd84aaa4f.pdf
    • https://duxudalo.weebly.com/uploads/1/3/4/8/134866109/b5b9c972e40ee.pdf
    • https://gareketekefebon.weebly.com/uploads/1/3/4/6/134695024/niboju.pdf
    • https://cdn.sqhk.co/wubunepan/1yr0fhb/llamada_al_valor_ww2_shooter_offline_download.pdf
    • https://cdn.sqhk.co/fuwifemi/2jaUBP9/morexujusewuseg.pdf
    • https://static.s123-cdn-static.com/uploads/4388178/normal_5fc8362535b5c.pdf
    • https://cdn-cms.f-static.net/uploads/4455886/normal_5fd7181bb0e41.pdf
    • https://firowugulok.weebly.com/uploads/1/3/4/4/134484499/572772b4f.pdf
    • https://cdn.sqhk.co/xujurovemu/iqibSVb/attic_24_granny_square_blanket_border.pdf
    • https://static.s123-cdn-static.com/uploads/4472185/normal_5fec149b7e9a1.pdf
    • https://lasezafokovopar.weebly.com/uploads/1/3/5/2/135294620/fd610.pdf
    • https://cdn.sqhk.co/kixituvelil/m2bgoHk/md_dm_cardiology_full_form.pdf
    • https://bugajikiwolano.weebly.com/uploads/1/3/4/4/134471946/7dc7f9ad68aa56.pdf
    • https://zapizurur.weebly.com/uploads/1/3/4/9/134900478/8905704.pdf
    • https://cdn.sqhk.co/sosexazefip/jcjgjca/wefatawiw.pdf
    • https://fonabanobegax.weebly.com/uploads/1/3/1/6/131636781/336270.pdf
    • https://cdn.sqhk.co/mewedenemez/jjfjgx0/juwom.pdf
    • https://tuzisufuga.weebly.com/uploads/1/3/4/4/134458332/ginujoregedebopekiw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000fd56.bin
670d7f4764f4326b73b34902223cb072105f86a81bfa55a12df721d5875c5878		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD56 5124 bytes
font_01_sfnt_off00010eb4.bin
10a223df6a6a6369c830bcb92a123205f1da8366595dce8bce2340bcc430371b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB4 10968 bytes

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