Malicious PDF — malware analysis report

Static analysis result for SHA-256 12ee817c7bf93469…

MALICIOUS

PDF

84.1 KB Created: 2021-04-26 05:01:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 5121477edc08be1674aeb8c43fcc22f6 SHA-1: cf741e3a34c981c9d4dc6fea31b9120a55682a5c SHA-256: 12ee817c7bf934696e0d61606a17798c6d502cec68173f00f857b5378788fa61
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, which is likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, appears to reference academic content, suggesting a lure for students or researchers.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/strik?utm_term=2018+ap+world+dbq+rubric PDF link annotation
    • https://cdn.sqhk.co/sunomedude/Hltvhdi/41509865438.pdfIn PDF document text
    • https://giromazipudu.weebly.com/uploads/1/3/1/4/131453901/2035615.pdfIn PDF document text
    • https://cdn.sqhk.co/kululojilo/OLCgfjf/cute_animal_gift_ideas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452377/normal_603074fc5a3d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457572/normal_605897f58e572.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387810/normal_602aa8f284a06.pdfIn PDF document text
    • https://mukavotedi.weebly.com/uploads/1/3/1/8/131856112/631453.pdfIn PDF document text
    • https://cdn.sqhk.co/kizusuvut/cgh2nhe/70605753417.pdfIn PDF document text
    • https://cdn.sqhk.co/sativomofij/iagjhc0/npr_battle_tactics_for_your_sexist_workplace.pdfIn PDF document text
    • https://cdn.sqhk.co/kakapoxavu/5Ddhd59/pratidin_newspaper_amravati.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367667/normal_600889be0ecc1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402964/normal_5fffa2606d069.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481820/normal_6006d4196b932.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372721/normal_60607d6f7e4bc.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/661e48e4-6873-449a-999e-7622c04fd161/jekotofuxaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9efd0179-54c0-4030-a875-e4b271fc0d36/24460633446.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6e2657c-aa68-4dee-b25c-747a0c033bc9/pediatric_ccrn_ccrn-k_certification_review_course_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9452940a-fcfa-418e-afc2-fbb2c7cedc19/lufiviraxigapinotivedo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d5e7f80-ce7d-435e-b2d6-6854c9954c70/midnight_sun_brewing_distribution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dfbb628-628b-4d13-b2f1-6a7a113742c0/nawadipumolepevux.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_off00010b2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2B 5672 bytes
SHA-256: 122806832cb0ad78ec0ba79f23f410955a17f7ebe3d74b0be26e22f7a5b8d290
font_01_sfnt_off00011e8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E8D 10984 bytes
SHA-256: 249bb591c54bea9f433de0c9fc2728a97ac04e02260ddbb930700f6a7be94acb

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