Malicious PDF — malware analysis report

Static analysis result for SHA-256 47d23427c4081b87…

MALICIOUS

PDF

109.4 KB Created: 2021-04-08 18:30:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c543ee8b505c64716f2f127330c2511 SHA-1: daf144d52f8adf86ab71183d03f275387b77beab SHA-256: 47d23427c4081b873ac053d322a45c66f0d508ea27a6a00157d8cd10be9f4718
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, contains text related to 'organic chemistry' and 'solution', suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/strik?utm_term=solution+organic+chemistry
    • https://cdn-cms.f-static.net/uploads/4449185/normal_605f8af15ee99.pdf
    • https://cdn.sqhk.co/rolileduvof/fMihheL/manapipidalixekegom.pdf
    • https://cdn.sqhk.co/getabemuto/d9hdsjc/95941200721.pdf
    • https://cdn-cms.f-static.net/uploads/4495999/normal_6052b00219352.pdf
    • https://cdn.sqhk.co/pozuwifofub/2vgf8VC/26637073873.pdf
    • https://cdn-cms.f-static.net/uploads/4380223/normal_602c69e097471.pdf
    • https://cdn.sqhk.co/wopidevepip/1iesF9a/cheating_tom_2_level_38.pdf
    • http://nawoxafibajove.22web.org/baby_bible_stories.pdf
    • http://sebevifa.getenjoyment.net/mapa_politico_centroamerica.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://mewuxugeje.epizy.com/xobosalawo.pdf
    • http://gujusuvamid.epizy.com/how_many_calories_in_boston_market_large_mac_and_cheese.pdf
    • http://luxupuxud.myartsonline.com/xonivi.pdf
    • https://76bf42c0-7447-45ed-8dd3-33f9786ae3ae.filesusr.com/ugd/ba2c19_d0958907db5e419aa2ca34286f78e439.pdf?index=true
    • https://6997f972-013f-4c6f-ac95-4179ba17a557.filesusr.com/ugd/549e1a_a5b10703834f409bab7d8b8ebaf657b2.pdf?index=true
    • http://mowelafawugek.epizy.com/52545647198.pdf
    • https://2e81f42f-67f9-46a9-89e2-a5f3ab3b03ee.filesusr.com/ugd/f138f5_3323c603fe9f451c9fe4ca94423edfd8.pdf?index=true
    • https://23da7c74-6e14-424a-b22a-901aa35eafb1.filesusr.com/ugd/9cc572_66b17d06653e40c980712da54c7b2e3b.pdf?index=true
    • http://fiwusinuba.rf.gd/danny_brown_atrocity_exhibition_zip.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_off00016d03.bin
532265dde329228510eea216810d656739b60d94c4909a6920caaad4a2db0abb
pdf-font-stream PDF embedded font (sfnt) at offset 0x16D03 5416 bytes
font_01_sfnt_off00017f4b.bin
4e39e86e042e311a0a1ceb47e20802629a2483f12e3e9af45c037fa711db085b
pdf-font-stream PDF embedded font (sfnt) at offset 0x17F4B 12344 bytes