Malicious PDF — malware analysis report

Static analysis result for SHA-256 17b31f288917fd72…

MALICIOUS

PDF

68.2 KB Created: 2021-03-25 22:27:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 5d76717a1651559fb73d7555f498de84 SHA-1: b44a04782160c9f03245b36cb6ea72df98bf6df0 SHA-256: 17b31f288917fd724118f1b0b509be1caae232bcea417cde16d4a4849a827277
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a phishing or content-scraping attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xezojetit.ru/award?keyword=dream+on+drum+chords+pdf PDF link annotation
    • http://ecoterritory.store/othello_unit_testg2vwm.pdfIn PDF document text
    • https://cdn.sqhk.co/tamejenonisi/zgifhgi/lunar_battlegrounds_ghost.pdfIn PDF document text
    • https://cdn.sqhk.co/sitopizol/jbtXXhf/tor_browser_for_iphone_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/guvawatuzax/ihahcha/lajusopisariz.pdfIn PDF document text
    • https://tiwofimobodes.weebly.com/uploads/1/3/4/0/134040820/jefevewipuwa.pdfIn PDF document text
    • http://naturalik.fun/5340559094um2dn.pdfIn PDF document text
    • https://fobuxowomi.weebly.com/uploads/1/3/4/2/134235628/f6230c7c1f7.pdfIn PDF document text
    • http://jalularuxubiw.iblogger.org/15216683762.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/u08gfAP/zig_zag_cactus_bloom.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/LidgjeK/ludidavijuz.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/xefejevife/annexure_h_passport_word_format.pdfIn PDF document text
    • http://rokafexoxo.epizy.com/nujogomipikubota.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/swayam_online_registration_form.pdfIn PDF document text
    • http://vofopinalog.epizy.com/14048048956.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/hard_math_riddles_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/analog_and_digital_signals_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/peak_backup_camera_installation_video.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/sifuvalez.pdfIn PDF document text
    • https://s3.amazonaws.com/timituvupame/dafenoboxetilufaru.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_off0000ccdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCDF 5360 bytes
SHA-256: 9c67e2ca929f7607407abfeb2a7b16719069b0dc8f1d2fdfdcce700258a360a7
font_01_sfnt_off0000def3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF3 11304 bytes
SHA-256: f8112de73f5210068a812dece149e38d1047d6eb1c2d069653b635b2c3d3a2ca

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