Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae6dfb12c527edc1…

MALICIOUS

PDF

79.8 KB Created: 2021-03-19 11:37:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 09d8ce360f9246beabec8e00c3fd2f3b SHA-1: fcd6b2e53a35602afd452b6e3482c457e85cba9a SHA-256: ae6dfb12c527edc1d6647d60b12de19a9c3763b91f82e68d9b44e1a4fff0ef02
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains a large number of external links, many of which are hosted on disposable domains, indicating a link farm designed to redirect users. The heuristic 'SE_PAYMENT_REDIRECT_LURE' suggests a pattern of impersonating financial institutions or changing payment instructions, which is a common tactic in business email compromise attacks. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://xezojetit.ru/strik?utm_term=bluedio+t2s+bluetooth+headphones+review PDF link annotation
    • https://cdn.sqhk.co/tavevalurov/jgwHhc6/punch_boxing_3d_mod_apk_rexdl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445739/normal_5fc6831420ea5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499651/normal_601d1738782ae.pdfIn PDF document text
    • https://cdn.sqhk.co/golemejexeno/ieGjeif/instagram_download_story_hd.pdfIn PDF document text
    • https://rupimobo.weebly.com/uploads/1/3/4/8/134891389/depepafix.pdfIn PDF document text
    • https://cdn.sqhk.co/rigizisojix/B6Q6ghY/dama_online_2_giocatori.pdfIn PDF document text
    • https://vodefuba.weebly.com/uploads/1/3/4/6/134688083/0331a615456b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412599/normal_5fc70c7357a13.pdfIn PDF document text
    • https://cdn.sqhk.co/lofujumixas/w7Lgc6d/pifemipofakifeta.pdfIn PDF document text
    • https://cdn.sqhk.co/jukunobegabe/gfggftz/jomoforipazobutatigu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9579f988-9383-433c-acf3-5fff76e0c882.filesusr.com/ugd/191a6d_675b53f3472749cca4bafaef4791ac50.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/toastmasters_table_topics_evaluator_template.pdfIn PDF document text
    • https://67d298e0-85f4-4ad4-bf36-e1ac857e42fc.filesusr.com/ugd/b6bf5b_23ed66ddb05c447b83704f9b21bdebff.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bisute/gokomusev.pdfIn PDF document text
    • https://bf130ee1-1463-4c69-9604-1b23772ced92.filesusr.com/ugd/b4609a_506372de484743ea91746c1b0649123d.pdf?index=trueIn PDF document text
    • https://6f672a44-e16c-4921-a0f1-e3781c0647c5.filesusr.com/ugd/bda22a_7ff06e4188c94f62b20f75c9a376f579.pdf?index=trueIn PDF document text
    • https://b1e6e3cd-24a2-426a-8b7d-e8f4bd81915b.filesusr.com/ugd/83e584_0cf79cfc7df54eed80e28f839142a6ef.pdf?index=trueIn PDF document text
    • https://3c1ad7ec-bfc7-452d-a92a-0d22078d3251.filesusr.com/ugd/c6e823_1c0b2f9a43ef41958557a33721911854.pdf?index=trueIn PDF document text
    • https://7aff118d-26f6-4d76-9bc9-1838009e7274.filesusr.com/ugd/f80014_d1fbd06220fb4b12aea616ab9cc7fb9f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/tolajifilamirimifalewu.pdfIn PDF document text
    • https://1864c106-1a4f-4194-99fb-dabd5a0af450.filesusr.com/ugd/17b194_6d733a9c1c8742598d8da162248995a2.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBC 2952 bytes
SHA-256: cb9072f881c1fe0ad8900bbcc5a20a23fabb306412f64e001cac76c2a9509f2c
font_01_sfnt_off0000f64b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64B 5520 bytes
SHA-256: 29a437fde3f02941cd743ec0ad4dc7b0a999f3fafbd7e842219c7883e70dced3
font_02_sfnt_off00010918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10918 11324 bytes
SHA-256: 6c042a76a271e67509c5276af2f935da0b38160aa87c1254d3db1c51904c9ccc

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