Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a302c2de2edaa1e…

MALICIOUS

PDF

82.4 KB Created: 2021-03-20 13:53:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1d587bce9471db0db23d2f888cf0363f SHA-1: 104daa8898e3fcb11e4108d2ff16c68555b07ffc SHA-256: 4a302c2de2edaa1e8e0d2cc1196bf32ee89956df4dee9c3de36e614e3ef9214c
116 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://golowaki.ru/strik?utm_term=how+to+get+a+medicare+summary+notice PDF link annotation
    • https://cdn.sqhk.co/titubebojek/jajcnWj/verakige.pdfIn PDF document text
    • http://retoxen.mypressonline.com/68726132596.pdfIn PDF document text
    • http://kunepuvobimamin.medianewsonline.com/xovogesemaranizagarisu.pdfIn PDF document text
    • https://cdn.sqhk.co/vilitemeru/Bjhv21l/zoned.pdfIn PDF document text
    • https://cdn.sqhk.co/lamiwifa/Vjhghhf/hammer_nail_game_thailand.pdfIn PDF document text
    • http://povar2020.site/black_and_decker_electric_weed_eater_gh1100_manualyvxbb.pdfIn PDF document text
    • https://cdn.sqhk.co/dubikewe/ZjcNrUa/62539016971.pdfIn PDF document text
    • http://winoorama.fun/61285443410ztvcq.pdfIn PDF document text
    • https://cdn.sqhk.co/sujubowip/jrgcBgh/good_football_drills_for_11_year_olds.pdfIn PDF document text
    • https://cdn.sqhk.co/wenudiwome/ehfgeij/zombie_prom_party_ideas.pdfIn PDF document text
    • https://cdn.sqhk.co/besogevipadi/gnib2ib/nafigowidojel.pdfIn PDF document text
    • http://sodaapp.club/sql_visual_quickstart_guide_3rd_editionxnn56.pdfIn PDF document text
    • http://wewogokuwidu.mywebcommunity.org/tenofinolumez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/58178581054.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/3859071954.pdfIn PDF document text
    • https://s3.amazonaws.com/nasitevu/pazufaxamixixu.pdfIn PDF document text
    • http://fowimifefezujo.myartsonline.com/vagabat_gita_bengali.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/master_of_money_sunday_adelaja.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/29881772865.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/17430860715.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/jewusife.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/fumujadonoponodudarigik.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/71905586269.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/zotikirinu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001031a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031A 5380 bytes
SHA-256: 4f423b9295ba5c9db63265177b41501e1c797856305806ce977938e0c7531976
font_01_sfnt_off00011569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11569 11272 bytes
SHA-256: f94319d9f4edb082e975585236885ffd0e8e85b5979da7a16b2753bce8eed853

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