Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff339cc4a53e9251…

MALICIOUS

PDF

83.5 KB Created: 2021-02-21 11:09:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e35f6e3e939ce46bb982e087aaa3cb8 SHA-1: eb92e7a20fada38f1791a7305e2c75acf6dfc17f SHA-256: ff339cc4a53e9251d4a7b99d79047865dd5faed63fe440dafcae4b8885582b72
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and ML classifiers. The document body, though heavily obfuscated, contains text that appears to be a lure ('Mr chang's menu'). The presence of embedded URLs and the overall detection by multiple security tools strongly indicate a phishing or malware distribution 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://maypoin.ru/wix?keyword=mr+chang%2527s+menu
    • https://cdn.sqhk.co/gatidixon/iCghihP/space_flight_simulator_game_download.pdf
    • https://xuzuvakewose.weebly.com/uploads/1/3/1/6/131637797/b9117a441f8.pdf
    • https://static.s123-cdn-static.com/uploads/4468253/normal_5fe12dd54b19a.pdf
    • https://cdn.sqhk.co/bomemenun/egdgi7F/67226646339.pdf
    • https://cdn-cms.f-static.net/uploads/4472793/normal_602bf5ca3c7fd.pdf
    • https://cdn-cms.f-static.net/uploads/4476011/normal_60158c767c301.pdf
    • https://static.s123-cdn-static.com/uploads/4393521/normal_5ff7d21eba386.pdf
    • http://dixurujisefumet.22web.org/atomic_structure_practice_worksheet_answer_key.pdf
    • https://xogefuvoza.weebly.com/uploads/1/3/2/3/132303221/5434927.pdf
    • https://cdn.sqhk.co/jifonakilux/XKyRZxg/31778024584.pdf
    • https://static.s123-cdn-static.com/uploads/4493888/normal_5ff53f9c1b784.pdf
    • https://jepigosewuva.weebly.com/uploads/1/3/2/3/132302921/5856204.pdf
    • https://cdn.sqhk.co/jegamaxegev/3jfWqNn/wulilenuliw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://reduxaxu.epizy.com/98103455085.pdf
    • http://kawisud.rf.gd/tegutafalafikosesok.pdf
    • https://s3.amazonaws.com/panalipolifod/13226212471.pdf
    • http://wabanatebaxu.epizy.com/vataxoxibal.pdf
    • http://gijuvaginitawaz.epizy.com/tufizazufejapozaraxe.pdf
    • https://s3.amazonaws.com/pivetuzadujo/bigobu.pdf
    • http://duwagisu.epizy.com/chitkara_international_school_uniform.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdf8.bin
e1be5e31b50aee3272efe05063e35add57734564304296c0f488461b65b2ead4
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF8 4864 bytes
font_01_sfnt_off00010e46.bin
beb97a7b07d5649311efd5d50939fd2142c56c1e585733b1b6e0823fb3f108da
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E46 10560 bytes
font_02_sfnt_off0001326b.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x1326B 4324 bytes