Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b75c0b21df495e9…

MALICIOUS

PDF

59.7 KB Created: 2021-03-17 00:31:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 3434012437cc7f001e55a08dfc43398c SHA-1: 5e1e5f902bcf2f67647e954efd69c99f7b0200db SHA-256: 4b75c0b21df495e9ec463378a7194b95c11531c1630d73558420776af0653afa
124 Risk Score

Malware Insights

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

The sample is a PDF document flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains and link farms, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to a specific PDF title, likely to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9577

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://lozipotod.ru/award?keyword=administracion+de+recursos+humanos+snell+bohlander+pdf+17a+edicion PDF link annotation
    • https://kenolafopufa.weebly.com/uploads/1/3/4/5/134528829/zaralebigupa_sifaku_kixixove_wilobujoxigos.pdfIn PDF document text
    • https://cdn.sqhk.co/mezomabesoki/yhfhejf/classic_scary_movies_pg_13.pdfIn PDF document text
    • http://fruktovik.com/mopejitowepuzixuki911ey.pdfIn PDF document text
    • http://copyrightshelpcenter.com/internal_medicine_clerkship_guidedfilr.pdfIn PDF document text
    • https://cdn.sqhk.co/xenivoronizu/3gfXngi/fruits_and_vegetables_for_kids.pdfIn PDF document text
    • http://betmoy54.com/365754231969au62.pdfIn PDF document text
    • https://fiwirozubaxezu.weebly.com/uploads/1/3/4/6/134659856/ronogi.pdfIn PDF document text
    • http://sfr-espace.best/33182312759dx10y.pdfIn PDF document text
    • https://cdn.sqhk.co/tokofape/gdjijap/27042100412.pdfIn PDF document text
    • http://natikolom.site/pexosazumopapuf.pdfIn PDF document text
    • http://bristol-yalta.run/hp_deskjet_3050_j610_ink_cartridge4lvnv.pdfIn PDF document text
    • https://cdn.sqhk.co/noxivudeva/m1ojdhi/big_ten_basketball_championship_game_2020.pdfIn PDF document text
    • http://onsideball.info/five_nights_at_freddy_s_free_roam_onlinec4rdd.pdfIn PDF document text
    • http://otshelnik.net/50999522332hglqw.pdfIn PDF document text
    • https://veduwasa.weebly.com/uploads/1/3/1/6/131637496/6080430.pdfIn PDF document text
    • http://mnclassis.org/voromupemorcaumf.pdfIn PDF document text
    • http://kelnoteres.xyz/36427095035u42u4.pdfIn PDF document text
    • https://gikejujeg.weebly.com/uploads/1/3/5/9/135966421/2a973676.pdfIn PDF document text
    • http://7gusevshop.space/1260674179xl3m8.pdfIn PDF document text
    • http://marafonsport.site/arc_low_back_painy6kk7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE19 5656 bytes
SHA-256: 3386ce413ef252385b646cea1182910160526af477c61fc6df97f4ccd0ee79f7

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