Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba495011aa2a3fa5…

MALICIOUS

PDF

82.0 KB Created: 2021-04-12 08:31:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b12fec025b62957506c4e599f1c0c811 SHA-1: a325a509c1b8cbe12db15a1101612305dd3b552f SHA-256: ba495011aa2a3fa56c71359c1c3e1b5bd970cff557a02c6691e466791b1d368f
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to reference a chainsaw model, suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://vilenefex.ru/strik?utm_term=poulan+p3314+chainsaw+idle+adjustment
    • https://cdn.sqhk.co/bipuzojafa/U5bzhbt/u_are_god_all_by_yourself_lyrics.pdf
    • https://cdn.sqhk.co/xubodijixali/a0hevAd/libunulologavojudiboxeru.pdf
    • https://cdn.sqhk.co/patemugimej/f1haSgh/gezonujes.pdf
    • https://cdn.sqhk.co/woleparos/aFhchc0/ballet_classical_music_free.pdf
    • https://cdn.sqhk.co/gesokusa/bbjefOZ/xisevafaxipevubape.pdf
    • https://cdn.sqhk.co/baruduwege/iiiaier/54488172719.pdf
    • http://takavejesutep.iblogger.org/canon_printer_mp258_scanner_software.pdf
    • http://kakafeg.scienceontheweb.net/neluviwelugokejuk.pdf
    • https://cdn.sqhk.co/tememagitapo/hhwjche/91284711170.pdf
    • http://xekilekugud.iblogger.org/zelidepurutunazoz.pdf
    • http://tuwukadinem.mygamesonline.org/mirisitulosigebo.pdf
    • https://cdn.sqhk.co/wuluzajiroz/iheXjh3/mesuzeze.pdf
    • https://cdn.sqhk.co/xeduwukaxusa/iUJjaKl/basketball_one_pointers_crossword.pdf
    • https://cdn.sqhk.co/xovikojux/jhidifI/fr_legends_livery_codes_r34.pdf
    • https://cdn.sqhk.co/furigelo/hwjhjiw/knights_inn_corpus_christi_texas.pdf
    • https://cdn.sqhk.co/wudajelu/fosuie7/pivomodojup.pdf
    • https://cdn.sqhk.co/kozutani/aijWiaB/kacey_musgraves_rainbow_sheet_music.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rorobifelajew.rf.gd/3878012267.pdf
    • https://uploads.strikinglycdn.com/files/b90b068b-a613-40c3-92db-b2ba4cde2f79/is_capitalize_a_word.pdf
    • https://uploads.strikinglycdn.com/files/0afb034b-48b1-4853-8a49-d032a2a2296a/gogekudubiv.pdf
    • http://pelebirepopo.onlinewebshop.net/logokemiminegovixew.pdf
    • http://tisikifapov.rf.gd/99741612324.pdf
    • https://uploads.strikinglycdn.com/files/33f4e491-78f7-451b-80a7-f4cc9b146243/26817083771.pdf
    • https://uploads.strikinglycdn.com/files/9c5f5875-f265-4233-a359-dacfafaacd12/81423688728.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_off00010072.bin
04b81666d694cebdef93d6517a65773f9156bb596c66ee6e51a03fbf50546aaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10072 5688 bytes
font_01_sfnt_off000113cc.bin
ce109731e75eba6efecda04b063ccf209521b5b4a1ce445bfa331937c6a6703d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113CC 11312 bytes

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