Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0cff806f733a87e…

MALICIOUS

PDF

273.8 KB Created: 2021-03-27 20:14:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 511111d3841c3e00d3b0cd5f91c2da06 SHA-1: c02496b28a7cdaf77b442ade790720b14da2a9e6 SHA-256: e0cff806f733a87e1e4bccba656eef6854f8586b603d786f314d7f4bb1b4a5a2
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector pointing to 'https://dafemum.ru/award?keyword=papyrus+of+ani+pdf'. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf and mentions 'Papyrus of Ani PDF', indicating a lure to trick users into clicking the malicious link. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://dafemum.ru/award?keyword=papyrus+of+ani+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4391599/normal_6015b5fd03e50.pdfIn PDF document text
    • http://jevafurevozu.mygamesonline.org/vevaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408170/normal_60490fac47b8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451348/normal_5fc7a12ee904b.pdfIn PDF document text
    • http://betizekaxu.getenjoyment.net/22837278206.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8ac5c8e1-9174-427d-95c2-90bebb9f105a.filesusr.com/ugd/44b221_f47b582be5dd487c86adb99138d50313.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1a1176e-1862-4754-a045-478d9c36e460/gekezovowofetewakon.pdfIn PDF document text
    • http://pinakebe.rf.gd/bitsat_2011_question_paper.pdfIn PDF document text
    • http://tademapapoli.epizy.com/the_gold_s_gym_beginner_s_guide_to_fitness.pdfIn PDF document text
    • https://9cfe8934-cc69-4f76-a0d0-2e9849ea4530.filesusr.com/ugd/fd9558_5927301e10aa4074b5d69e59f72b063c.pdf?index=trueIn PDF document text
    • https://3d7c42e8-cad9-4196-8f3c-0f210fd97588.filesusr.com/ugd/1b7c00_e023c1acef9743119eaa429ecfcc9caf.pdf?index=trueIn PDF document text
    • https://35b1a599-9f45-4897-82ce-59a931fc5495.filesusr.com/ugd/daca0d_cb057c4cf87841869808093cf13d73f7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/60f6a3ea-cd1d-4474-a126-c1f87d6cdb01/rangers_apprentice_the_ruins_of_gorlan_reading_level.pdfIn PDF document text
    • http://woloripovopakop.rf.gd/candy_land_game_instructions.pdfIn PDF document text
    • http://bifiwapaz.onlinewebshop.net/the_absorbent_mind_download.pdfIn PDF document text
    • http://povezemusugag.rf.gd/12810648800.pdfIn PDF document text
    • https://08b4a39d-fa16-4eaa-91be-ae90003cacb9.filesusr.com/ugd/237bf7_1fcfe448e3424a118ef6c431640269b2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f30f4c36-3ebc-4635-a4fb-68c65b7e9a1e/wamatikumerokegugu.pdfIn PDF document text
    • http://tugoxejemikoze.epizy.com/lejowokini.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_off0004032f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4032F 5104 bytes
SHA-256: 2143035f40dd80e49a35ebd5eab89150c8acc091bef17dd05468f639ad5b6d04
font_01_sfnt_off000414a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x414A2 10668 bytes
SHA-256: 3da8e0ecbcf7724a444a80d2a4e0fae19f467784da132a65d72b8b24300baa04

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