Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f662d154b88ae29…

MALICIOUS

PDF

80.9 KB Created: 2021-04-28 16:21:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 6dbe0bd4ba814ba0d552698466ec68cf SHA-1: 59ffd983897221824855a1b55cbe261070a23895 SHA-256: 0f662d154b88ae2901062463a5086fe3c641bf590d09a8873597d5ab90177c2b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, identified as a 'PDF link farm', with several pointing to suspicious domains like botokaw.ru and rastet-malysh.ru. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, but the structure suggests an attempt to redirect users to malicious content.

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 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://botokaw.ru/strik?utm_term=let+teenager+try+adulthood+answers PDF link annotation
    • http://rastet-malysh.ru/my_ride_65_installationia80c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405409/normal_602a37e95665a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443803/normal_5fe3bcf5444f6.pdfIn PDF document text
    • http://form-lnstagramverificationbadge.com/dubitn932p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491159/normal_6044225719155.pdfIn PDF document text
    • http://centerbluebadge.com/66087587979epzn1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0face946-3507-4f1d-9804-30df5ac990e4.filesusr.com/ugd/8dfcc1_6df0b0d493854e42bef4d1100c2efc26.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/poresi/gipapawafefipafano.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/adele_hello_lyrics_video_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea059012-0e7c-48fd-8ccb-4736ca01ae72/83159349393.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/abu_garcia_pro_max_40_spinning_reel.pdfIn PDF document text
    • https://0879403c-3be5-48e4-925f-21334a7d5cfe.filesusr.com/ugd/407fcc_99cdfcbc200a48e8a3d6799612cc51ba.pdf?index=trueIn PDF document text
    • https://02314edc-d025-420b-9d62-795437f25c47.filesusr.com/ugd/4f0fc1_a8cb33ba1ece49d1ac0f1ffa30e103a8.pdf?index=trueIn PDF document text
    • https://5634f520-c25d-421d-ab67-3d94505d13cb.filesusr.com/ugd/1b85ab_f24168895a1e4cbc9f1db8fd64a7e261.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/92552962975.pdfIn PDF document text
    • http://zedebegeku.myartsonline.com/16533068759.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/types_of_bones_formed_by_intramembranous_ossification.pdfIn PDF document text
    • http://fabedidatifi.onlinewebshop.net/how_much_does_a_chick-fil-a_franchise_owner_make.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f52e99ea-ce16-41cb-9c55-95aa139fc8c7/2013_subaru_impreza_wagon_review.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_off0000fd30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD30 5220 bytes
SHA-256: fc8bb2b31cb4cafd26acf7485da2e8d92e23a51d7d772d27a4bec04a65b76269
font_01_sfnt_off00010f00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F00 11252 bytes
SHA-256: 062578f9714b8ba1f57df809f374222b95793c3629737417a4f9982ed7e1e03a

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