Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7f71722ce8afe8f…

MALICIOUS

PDF

128.7 KB Created: 2021-03-19 13:59:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: ce397b1584ca1c9ed4814187f4c1460d SHA-1: 246d7e62a1b2cbb44f9a61be280d8a5c4b143394 SHA-256: f7f71722ce8afe8fbdf81c54c88f6a0f7b6ec6604b45b25dc508901c6a475d01
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing lure. The document body, though heavily obfuscated, suggests a search result context, further supporting the phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • 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://xajibur.ru/strik?utm_term=pablo+neruda+books+in+tamil PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417817/normal_603c511bd97ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490524/normal_602cfdfc6944c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375884/normal_5fd342857ec96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373304/normal_603d1fed3b28e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486206/normal_60513c7e07a08.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415068/normal_5fe3b09a38454.pdfIn PDF document text
    • http://wubowobipevoto.mywebcommunity.org/78434789301.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494417/normal_5fe1474d04aad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421061/normal_5ffe4b2d24b7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412160/normal_6025b4c243b93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425256/normal_60146524d95b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502236/normal_60187cc10fa45.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464707/normal_5ff5ae46c2711.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484805/normal_5fd61255b5a16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460057/normal_5fe8056f43ecc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448545/normal_602225e7e2abd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452609/normal_6049835ceadc7.pdfIn PDF document text
    • http://vubitim.sportsontheweb.net/lincoln_pro_mig_140.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2c57a45-c7b8-49d2-a1e3-315ae7e64211/the_non_designers_design_book_summary.pdfIn PDF document text
    • http://polilofu.onlinewebshop.net/19766542550.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f924dfa-ab5b-4f5b-b948-f122a88ee0ae/what_are_some_words_for_multiplication.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc64c826-88d1-4eda-90d3-33e9c50a3fa7/24047014003.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d631c751-5b4f-483b-b40b-e0e708b4b411/murray_12.5_hp_40_riding_mower.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_off0001addf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ADDF 5176 bytes
SHA-256: 0889cfc0027ad2ac3927a46d92e5d0ee4beef186b49793b2ad0b52464f8d0b6b
font_01_sfnt_off0001bf5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BF5D 17600 bytes
SHA-256: ad09176b683538fd68bbbc244d78a6c84785c463753955da387c273ce1667ba3

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