Malicious PDF — malware analysis report

Static analysis result for SHA-256 8587ef1158311a8d…

MALICIOUS

PDF

196.8 KB Created: 2021-03-17 18:33:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa5a7994d25cf27221e98ce0fc7db953 SHA-1: 97b367ec989d240ec56437ef7a93fddf33523255 SHA-256: 8587ef1158311a8de54b221fe6e7fb68f204849f5ce94ce28791de0fcfaaf8b1
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan-like behavior. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into visiting a malicious site for an award. No scripts were extracted, but the presence of an external URI strongly suggests a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://kuzutuzo.ru/award?keyword=caliph+ali+pdf
    • https://static.s123-cdn-static.com/uploads/4464052/normal_5fcd5eb13ec5c.pdf
    • https://mujugoseboli.weebly.com/uploads/1/3/4/3/134312554/c223bcab85.pdf
    • https://gonedosi.weebly.com/uploads/1/3/4/7/134730609/tutopa.pdf
    • http://azules.ru/porter_cable_6902_collettump7.pdf
    • https://static.s123-cdn-static.com/uploads/4374371/normal_5ffb0bddd5566.pdf
    • https://wikabolodaj.weebly.com/uploads/1/3/4/6/134648749/1753244.pdf
    • http://luminar2-download.xyz/2_nephi_20_18e3pwl.pdf
    • https://lapedegino.weebly.com/uploads/1/3/4/6/134689006/82d4786df6.pdf
    • http://bu-markett.com/ktm_owners_manual2dexq.pdf
    • http://superheatbelt.xyz/average_salary_masters_in_counseling_psychologya69oh.pdf
    • https://cdn-cms.f-static.net/uploads/4388835/normal_5fd840bee7506.pdf
    • http://pc-remont.website/new_naats_2019_audiox0uso.pdf
    • https://giwulotasika.weebly.com/uploads/1/3/1/4/131411199/julonetisuzib-jalusuni-juvunodomipufum.pdf
    • https://vinosubolab.weebly.com/uploads/1/3/5/3/135316207/fudapud.pdf
    • http://metilukizitase.iblogger.org/tefinosinuropogaw.pdf
    • https://katabeguravaka.weebly.com/uploads/1/3/1/4/131407194/mubiwogaxuledi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://wozurowimure.epizy.com/74826494041.pdf
    • http://lobulowigewimu.epizy.com/daluxinikivofenut.pdf
    • https://s3.amazonaws.com/vibasujefir/english_grammar_punctuation_and_spelling_test.pdf
    • http://sirerig.epizy.com/wujegusujagosokasemedew.pdf
    • http://lekinip.epizy.com/90423404468.pdf
    • https://s3.amazonaws.com/vudivuzakal/65223328058.pdf
    • https://s3.amazonaws.com/wakuzidi/bmw_navigator_vi_car_kit.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0002c2c3.bin
1f055b71bd24fab3b44f1ca67e7077122901fefa0883de2ec11b34728985f00c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2C2C3 29484 bytes
font_00_sfnt_off000289d0.bin
806f6d4171eaf8b3712f8042accf77797e23e4d96d50923cbcb575f9adf4d70e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x289D0 4252 bytes
font_01_sfnt_off00029841.bin
d4fb221fbb7c5b0ed7ee083a3034ef4836a60195ab22890169e2dde73a290048		 pdf-font-stream PDF embedded font (sfnt) at offset 0x29841 13184 bytes
font_03_sfnt_off0002f6c4.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F6C4 4324 bytes

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