Malicious PDF — malware analysis report

Static analysis result for SHA-256 38e0919221f4f91d…

MALICIOUS

PDF

82.5 KB Created: 2021-04-29 21:53:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e8f7459b9885e1a80e1cf7914263f51 SHA-1: 9515361536213135aa482da0ced18c47433de246 SHA-256: 38e0919221f4f91dcce5b8fa18061232904134dd3a1b534a29943383f4c62daf
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 phishing or trojan payload. It contains an embedded URL pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, appears to be a lure related to online shopping, specifically 'best self defense knives on amazon'. No scripts were extracted, but the presence of embedded URLs and the overall detection suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/strik?utm_term=best+self+defense+knives+on+amazon
    • https://cdn.sqhk.co/bufutoje/iiWjg8g/zodomepitine.pdf
    • https://cdn-cms.f-static.net/uploads/4416675/normal_6029e10406bd3.pdf
    • https://cdn-cms.f-static.net/uploads/4464524/normal_605f599dc9449.pdf
    • http://instgramcopyrightdispute.com/what_is_the_correct_structure_of_a_body_paragraphxynsl.pdf
    • https://cdn-cms.f-static.net/uploads/4454161/normal_602a97eae30b5.pdf
    • https://cdn.sqhk.co/devurekon/iwyBhaj/retro_space_artists.pdf
    • http://jesubenodewopob.22web.org/tecumseh_throttle_linkage_adjustment.pdf
    • http://sewonmedix.ru/13554707443h3yo8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vegewamofuxa.rf.gd/rugololarakopiw.pdf
    • http://golizewojavizav.epizy.com/monitoring_and_evaluation_process.pdf
    • http://vokorugagamozi.rf.gd/96287789884.pdf
    • http://fanuzisi.epizy.com/ncert_chemistry_text_book_class_11.pdf
    • http://waxasaxer.epizy.com/calculus_hughes_hallett_7th_edition.pdf
    • http://dirujuwut.epizy.com/alice_in_wonderland_movie_in_english.pdf
    • http://notumaxesi.epizy.com/gravity_against_the_current_song.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_off00010497.bin
efe3c2cbcf85d3e850fb9a4bc330df1e71d5a5e06d119996c869429b257a50ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10497 5180 bytes
font_01_sfnt_off0001163e.bin
b999c292a1d9f0fa3cd19046a69fde1ad080553a3762fb102f3335a7c5018b11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1163E 10932 bytes

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