Malicious PDF — malware analysis report

Static analysis result for SHA-256 9739cc672dba7e32…

MALICIOUS

PDF

72.1 KB Created: 2021-04-07 00:38:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 09bdb96d85d7da9c80c2d1cf9f345542 SHA-1: 8d23bc05b9e3c49ddc502edce7680e4d708adac2 SHA-256: 9739cc672dba7e320cba8c0c9298dfd2040f34c93475e69a16a1490ac545795a
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were directly extracted, the PDF structure and embedded URI heuristics point towards techniques used to host malicious content or redirect users to compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://xajibur.ru/wix?keyword=empire+axe+mini+manual PDF link annotation
    • http://philonio.online/pozediforw66l1.pdfIn PDF document text
    • http://zdorovie-vashe-vse.xyz/219741371240w9nx.pdfIn PDF document text
    • https://pumebogevi.weebly.com/uploads/1/3/4/5/134583518/63d32.pdfIn PDF document text
    • http://jadebey-x.com/3881917037zpkh6.pdfIn PDF document text
    • https://devonejejarib.weebly.com/uploads/1/3/4/6/134608322/rikegotepaxa.pdfIn PDF document text
    • http://djami.ru/fanatical_football_mod_apkk8mmw.pdfIn PDF document text
    • http://idealica-itufficiale.website/barbie_dreamhouse_adventures_dolls_amazonl4y1c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c335e157-9962-4e43-983a-f5fcf491c4e2.filesusr.com/ugd/a09b09_1dfd9202e7fb4eefbc1b1b0fde8383b0.pdf?index=trueIn PDF document text
    • https://14864a69-2465-45da-a912-c6f78a3f99b9.filesusr.com/ugd/409ca8_69c8c0bcbd2e4903a7b62879077e24e9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/best_free_powerpoint_templates_for_school.pdfIn PDF document text
    • https://722d0b64-886f-48d6-ad1d-3f240095bb95.filesusr.com/ugd/07f6b3_0b633f25e72045d890849fd7a3991414.pdf?index=trueIn PDF document text
    • http://wobazopaf.epizy.com/da_form_1156_casualty_feeder_card.pdfIn PDF document text
    • https://521a9f5b-5c7e-4f25-a9e4-5446fb1b1975.filesusr.com/ugd/c1a494_8b37aec6fde949ff8f146265b3bddf63.pdf?index=trueIn PDF document text
    • https://d38713d8-f9e0-49bf-8e72-3f46774ce551.filesusr.com/ugd/b3faf5_f0d2d707737046c9bc7cf9fc0b6f40be.pdf?index=trueIn PDF document text
    • https://c20a02f1-eded-46de-afbf-2d7328e03b26.filesusr.com/ugd/c6fd25_c38b5ae96923466d94a3104b82c1e8df.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/jidagot.pdfIn PDF document text
    • http://sapofikij.epizy.com/kipalokotojetatob.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_off0000def8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF8 4812 bytes
SHA-256: 215014768c334104317732923c00ed5b0101b0d18368a10ea165500f8daff5b7
font_01_sfnt_off0000ef41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF41 10732 bytes
SHA-256: 416587d45795c2a894b4eeb675b460dbd992604ff93b10791625924d766e92f0

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