Malicious PDF — malware analysis report

Static analysis result for SHA-256 817ce931742935fd…

MALICIOUS

PDF

72.4 KB Created: 2021-03-05 17:18:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d79a9e398197e17726bd3d2d555ed024 SHA-1: 231e278f63f508a6eeb7dbb13d5af66b3f211a12 SHA-256: 817ce931742935fdd8b7cd8aacacb158840f75d7facdc80ce4a49f503aea1276
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating it is a phishing trojan. The document body and embedded URLs suggest a lure to a malicious domain, likely to download a secondary payload. The presence of PDF_URI and EMBEDDED_URL heuristics further supports the malicious intent of directing users to external, untrusted resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://kuzutuzo.ru/aws?utm_term=champions+of+ruin+3.5+pdf
    • http://halfraire.xyz/how_do_you_swap_tiles_in_scrabble_gorfwkm.pdf
    • http://alexsaf.ru/84991530424hm0p3.pdf
    • https://lafefetakizin.weebly.com/uploads/1/3/2/7/132712235/598316.pdf
    • https://nopirepogoduk.weebly.com/uploads/1/3/4/0/134095858/tunefusaxixodosarif.pdf
    • https://cdn-cms.f-static.net/uploads/4483088/normal_601a2afe1da10.pdf
    • http://copyrighthelpcentral.com/9285609608mlxtx.pdf
    • http://nozipomak.iblogger.org/18750386305.pdf
    • http://drovazvenigorod.ru/seeleys_anatomy_and_physiology_12th_edition_apa_citation79iwn.pdf
    • http://shopbest.online/netflix_how_to_train_your_dragon_2_full_moviek0bep.pdf
    • https://raputaluwim.weebly.com/uploads/1/3/1/6/131606275/laviloluxolipi.pdf
    • http://lnstagrambusiness.com/kexusuwoxefutumu8nde9.pdf
    • https://cdn-cms.f-static.net/uploads/4446015/normal_60253a4614e15.pdf
    • https://cdn-cms.f-static.net/uploads/4456728/normal_601a1ec9d01e1.pdf
    • https://punuvenow.weebly.com/uploads/1/3/4/4/134445800/movikiwatux.pdf
    • http://nakanilo.club/how_to_turn_on_bluetooth_on_signia_hearing_aidgrp8x.pdf
    • http://pink-echo.club/substitution_cipher_example3w92e.pdf
    • http://megatorg.ru/marvel_universe_reading_guidencehi.pdf
    • https://static.s123-cdn-static.com/uploads/4451945/normal_5fddf60eeeeba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zagubip/48667903203.pdf
    • https://s3.amazonaws.com/zunewidimem/7360379429.pdf
    • https://s3.amazonaws.com/zarevizebi/dear_sir_madam_letter_template.pdf
    • http://mewexudidis.epizy.com/pibib.pdf
    • http://fokibofu.epizy.com/physical_science_grade_12_exam_guidelines_2014.pdf
    • http://zezevefo.rf.gd/tezejere.pdf
    • https://s3.amazonaws.com/budovewesekaz/jajepemexugaxufofapu.pdf
    • https://s3.amazonaws.com/fikuvine/71986896.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_off0000d98c.bin
d06114670e2c0100452176bd24c03fe2ea059370e88f4114df7dab46609526ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD98C 5476 bytes
font_01_sfnt_off0000ec03.bin
64cd4c1ec88f608cda1fc04df9f6ac4cba79e22b22b5f7bbae31601b4e261508		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC03 11136 bytes

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