Malicious PDF — malware analysis report

Static analysis result for SHA-256 92275cc7672edbb7…

MALICIOUS

PDF

76.8 KB Created: 2021-01-31 01:48:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 469026a16cf6a8fa8440fd0aa6ba85b8 SHA-1: d1a2d7cbb8386d934399f71e221a807325b240b1 SHA-256: 92275cc7672edbb7d80a010c68391bb88ddac4a0a12ceb3ef55fa27b8f75cfd5
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 ML classifiers and ClamAV. The document body, though heavily obfuscated, contains text that appears to be a lure related to "Adjective adverb noun forms", likely intended to trick the user into clicking the malicious link. The presence of embedded URLs and the overall detection by multiple security tools strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/aws?utm_term=adjective+adverb+noun+forms PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4446270/normal_6000c162e09a1.pdfIn PDF document text
    • http://moresukko.ru/sweet_sins_superstars_mod_apklwoxi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409614/normal_5ff8ba537ee10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496360/normal_60068d6f55db1.pdfIn PDF document text
    • http://pop-marketplace.ru/stackers_jewellery_box_amazonxl5z7.pdfIn PDF document text
    • http://istlan.space/nodafunuzimivazo0lyhn.pdfIn PDF document text
    • http://masterpowerpoint.com/exxon_historical_stock_chartct5wk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/rakabexozu/zojakivaliviguxen.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/airic_ft_manqonqo_ubuntombi_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/chogada_tara_video_song_loveratri.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/sonagusenunagow.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/runukuwo.pdfIn PDF document text
    • http://latowetutut.epizy.com/gafofap.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/zofusikemiwesujesagev.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE432 5280 bytes
SHA-256: f68615b0c7ba97803cbadec9384605cb1b2cdaa63897733a1ea70091ea0ff565
font_01_sfnt_off0000f60e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60E 10092 bytes
SHA-256: 474eb531cf567751536f6f046dc2f33363dcf5195ae920bbbee9ad874c9db8b3
font_02_sfnt_off00011883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11883 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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