Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9717167f07ba037…

MALICIOUS

PDF

84.9 KB Created: 2021-03-07 05:42:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 14eb899e43dc84f6f84aa99ed6894521 SHA-1: 9635b8e557f319d6ff40a604486fa2799d3fed16 SHA-256: d9717167f07ba0372088d8d5c91942b1e3bdfb3be976d9da1bc3fe00eaca3a0e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs and is flagged by heuristics as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://soxebez.ru/aws?utm_term=democracy+in+black+chapter+1+summary PDF link annotation
    • https://cdn.sqhk.co/kixagixupo/3hiVkgh/rurore.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388627/normal_5feef602eb25c.pdfIn PDF document text
    • https://cdn.sqhk.co/fularulojoze/ghhtXF2/98182187312.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369520/normal_5fea21e9a0d4b.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/hegjOnJ/66501304235.pdfIn PDF document text
    • http://poposiruta.mywebcommunity.org/40334292975.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/hZihsii/be_true_air_force_1_2020.pdfIn PDF document text
    • https://nudabixe.weebly.com/uploads/1/3/4/5/134505388/83b22a401064fbd.pdfIn PDF document text
    • https://rulakufip.weebly.com/uploads/1/3/4/4/134489053/zoneje.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/tivedaramozokiri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382186/normal_601ccdfdd9c67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456699/normal_5fdbe40cb561c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://timojodabemisux.myartsonline.com/35659319229.pdfIn PDF document text
    • http://zotubune.myartsonline.com/76195597970.pdfIn PDF document text
    • http://mosokiwilag.rf.gd/sowezexujogir.pdfIn PDF document text
    • https://ca30e0e0-ecf2-44ab-b6a2-fe26291458be.filesusr.com/ugd/34e21e_7ba9f8959007448694676e5c26a17628.pdf?index=trueIn PDF document text
    • https://598a1783-db1d-4ebb-96f5-d3ad23e1e090.filesusr.com/ugd/ae99eb_a09ae32690ad4c95b0ac62fdef9ec74a.pdf?index=trueIn PDF document text
    • https://bb55feb6-a0c4-48ae-8f72-aea2c45912f8.filesusr.com/ugd/b9801a_424ed30f3ab24e29b266e39d2bc51d62.pdf?index=trueIn PDF document text
    • http://jumepenitujox.atwebpages.com/polycom_vvx_410_reset_admin_password.pdfIn PDF document text
    • https://e85625e8-91d5-48c2-95a4-67b7b95d5b39.filesusr.com/ugd/b97a97_c9a9ce2f4fb2484f8c85280290cf7f1b.pdf?index=trueIn PDF document text
    • http://xodojes.epizy.com/kadoxanosawewopexowo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2C 5412 bytes
SHA-256: 6b8b9e2554b73aa77eaaeae40a8dafc26883b68ba03965bd077d53517845f910
font_01_sfnt_off0001116b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1116B 11316 bytes
SHA-256: 6b41638eac88df46b4bdbfd1904fded9c8ce43e6ca7a2ecbd54de9558cd8a221
font_02_sfnt_off000137c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137C2 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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