Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d3c29eb07ce5f0c…

MALICIOUS

PDF

98.5 KB Created: 2021-04-05 18:30:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b965c5f288f05ad326e6991f3d970d70 SHA-1: d81d99adeefc8f479abcc969f599d093473a8362 SHA-256: 7d3c29eb07ce5f0c260f5bd28d0db40bdf1b8411fc295031319d046a8c3d5c06
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that masquerades as a search result for a banned book, likely to trick the user into clicking it. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URI heuristic suggest it's designed to redirect users to a malicious site.

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://dafemum.ru/strik?utm_term=why+was+the+adventures+of+tom+sawyer+banned
    • http://rubezemanugewev.22web.org/inspection_checklist_template.pdf
    • https://cdn-cms.f-static.net/uploads/4376369/normal_6012528a8abb9.pdf
    • https://cdn-cms.f-static.net/uploads/4466151/normal_60635dce95d37.pdf
    • http://ximamigi.iblogger.org/english_story_books_for_beginners.pdf
    • http://manamuposa.getenjoyment.net/bodebonanaxamekire.pdf
    • http://sagunutu.medianewsonline.com/76730661388.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://pewubep.rf.gd/zaxugaxibekapogujotikov.pdf
    • http://wugupur.epizy.com/39281368377.pdf
    • http://tawatibajat.rf.gd/47471928171.pdf
    • http://xavemiwikujuxuk.rf.gd/13420875576.pdf
    • http://wutodabegaf.epizy.com/677683150.pdf
    • https://d4078116-a2d5-466f-97e6-20d899f6ca30.filesusr.com/ugd/576447_04c3fd63039d4c678a689d657d3434fc.pdf?index=true
    • http://dibujofas.epizy.com/84150373715.pdf
    • http://foxivowopejo.rf.gd/70027946959.pdf
    • http://fusisalumipever.epizy.com/64523166451.pdf
    • https://51bf459c-6b46-41b0-863f-532cf8a77e0d.filesusr.com/ugd/2eedf1_7a064ffa9fc14d61889fabbf95fcbb3f.pdf?index=true
    • http://wajufuful.rf.gd/66120335104.pdf
    • https://09972071-4174-499b-90b1-de3619f59f53.filesusr.com/ugd/d1c05f_972fd680c6a34654bda23c1822d9e627.pdf?index=true
    • https://f733e552-90a1-4d1f-83ca-a6b36afcf31c.filesusr.com/ugd/38bf1f_df4c38c888544c7eba25afd3934b38ee.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012fb6.bin
895d2c14aef31ae8bcb79aba623fa4232f2c434c7539f668fb133a7a9efbb994
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FB6 5356 bytes
font_01_sfnt_off000141cb.bin
c1ffed9a99be5c2dd443b4ed9ea06fb8a91101e43f994a37341623b9cf31466c
pdf-font-stream PDF embedded font (sfnt) at offset 0x141CB 14124 bytes
font_02_sfnt_off00016e42.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x16E42 4324 bytes