Malicious PDF — malware analysis report

Static analysis result for SHA-256 36a31a0bc6d22880…

MALICIOUS

PDF

82.2 KB Created: 2021-03-23 11:32:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0ec36f7ec3cf5f3c264783b72e620db SHA-1: ebb0e5f14b2d2f0596290d496ce39b6e8b7e91f1 SHA-256: 36a31a0bc6d22880cfef4cf8a9fca8aaaa1d1ca541978af1a71c2df3dd814607
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript T1553.005 Security Software Installation

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate social engineering tactics, including instructions to bypass security measures and execute commands, consistent with ClickFix attacks. The embedded URL points to a suspicious domain, likely serving as a lure or part of the attack chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://bologen.ru/strik?utm_term=why+doesn%2527t+my+ipod+nano+turn+on
    • http://suziterunedoloj.sportsontheweb.net/fuwamurepikesizelenuwu.pdf
    • http://sogixusi.medianewsonline.com/juzujakaritisananiwip.pdf
    • http://golesaluwo.66ghz.com/freedom_and_the_spirit_berdyaev.pdf
    • http://dipazekonowa.mypressonline.com/jasagumosowak.pdf
    • http://kalukawuwo.mygamesonline.org/l_attacco_dei_giganti_manga.pdf
    • http://bapadama.medianewsonline.com/behold_your_mother_tim_staples.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wuxejosijaja.epizy.com/ffbe_ifrit_build_guide.pdf
    • http://vepilezora.epizy.com/mapamundi_politico_mudo_para_imprimir.pdf
    • https://s3.amazonaws.com/sogovekevi/audiophile_optimizer_manual.pdf
    • http://fanugisenok.epizy.com/amore_e_psiche_libro.pdf
    • https://s3.amazonaws.com/dusined/articles_worksheet_for_grade_7.pdf
    • https://s3.amazonaws.com/gonasidupij/how_to_change_belt_in_whirlpool_cabrio_dryer.pdf
    • https://s3.amazonaws.com/tiluwisulepam/34902401625.pdf
    • http://rogofideb.onlinewebshop.net/jagewizujotifapanezigam.pdf
    • https://s3.amazonaws.com/kaxukok/borulesipewimen.pdf
    • https://s3.amazonaws.com/pafiganovavi/ropidazerasixepalifufet.pdf
    • https://s3.amazonaws.com/metakibeme/97771266854.pdf
    • https://s3.amazonaws.com/lomogas/xozudeboxa.pdf
    • https://s3.amazonaws.com/borokegujuzero/3530779491.pdf
    • https://s3.amazonaws.com/biwubeleba/89432315569.pdf
    • https://s3.amazonaws.com/kisagoz/2721621770.pdf
    • https://s3.amazonaws.com/tasufagijaremo/nagokotuxunawibuluzam.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_off0001011b.bin
ec6b7d4bde96509c7e28fbb03c14a2c9ec703c8bbb9d42d138c04e93d0dcaab9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1011B 5316 bytes
font_01_sfnt_off0001131a.bin
1513bb0650109903f24a904b448e333130435b690fe3ed0622a567aa572e3dee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1131A 11384 bytes

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