Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b2444453c29af2c…

MALICIOUS

PDF

73.4 KB Created: 2020-12-20 04:16:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b7ca584049cad1ab7acf633eee2bad7 SHA-1: d49939294370d4d4e3f57214d07cc5accd18fbd8 SHA-256: 0b2444453c29af2c92fc289025c652387c2fbb1091ac3a7c5e9ede6f94ea567b
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL that, when visited, likely leads to a phishing or malware download page. The document body, though heavily obfuscated, appears to be a lure related to an "engineering economy" solution manual.

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://trafffi.ru/strik?utm_term=engineering+economy+7th+edition+solution+manual+pdf
    • https://cdn-cms.f-static.net/uploads/4492281/normal_5fb58a6a02205.pdf
    • https://cdn-cms.f-static.net/uploads/4485001/normal_5fbd30943bb1f.pdf
    • https://static.s123-cdn-static.com/uploads/4452169/normal_5fcbeee0aadc5.pdf
    • https://cdn-cms.f-static.net/uploads/4385435/normal_5fb46ef7230f8.pdf
    • https://cdn-cms.f-static.net/uploads/4387816/normal_5fae2fdc3aed4.pdf
    • https://cdn-cms.f-static.net/uploads/4393019/normal_5f9083bc9a00e.pdf
    • https://cdn-cms.f-static.net/uploads/4384655/normal_5fb82e691ce4b.pdf
    • https://cdn-cms.f-static.net/uploads/4376850/normal_5f8b525a7926a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4ca29ee0f32b8749f73a/1606372515364/fur_elise_piano_easy_letters.pdf
    • https://uploads.strikinglycdn.com/files/0aebfb75-3f17-47d8-a465-835e839936bd/unblocked_gba_roms.pdf
    • https://uploads.strikinglycdn.com/files/87e7ef83-465e-4618-9851-26689c6854b4/a_primer_in_positive_psychology_christopher_peterson.pdf
    • https://uploads.strikinglycdn.com/files/d7c795c5-1547-4c32-abb9-4811fcb3e9eb/generator_rex_episodes.pdf
    • https://uploads.strikinglycdn.com/files/142795cc-f490-430b-ac0f-92a4da9ffc6d/48180506758.pdf
    • https://uploads.strikinglycdn.com/files/9183a021-3de3-498d-b875-858a2abb12c2/duvutesukeni.pdf
    • https://uploads.strikinglycdn.com/files/f8f93658-e5cf-4a12-b73c-0bdfef5ec4ab/come_back_to_the_five_and_dime_jimmy_dean_trailer.pdf
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df15.bin
c8588e301a07b69801ce54f71a0060549214cac6a0bef84db7ce007ab7748dda
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF15 5708 bytes
font_01_sfnt_off0000f271.bin
e7ca3d4ff47bf0ac9747e2bbeacb4292bcc66916edfa380f012a9d27891449a6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF271 11084 bytes