Malicious PDF — malware analysis report

Static analysis result for SHA-256 44950ac35112ac77…

MALICIOUS

PDF

71.1 KB Created: 2021-02-11 07:14:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a75755a0c49487ad54bc9b79d58454f2 SHA-1: 8af1d195cf56576a29e9f74b23d00be1803d9b75 SHA-256: 44950ac35112ac770ea9cf0e4d973b505f36bd57bf38d3fd22264f65aec57f18
126 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML and ClamAV, indicating it is likely a phishing lure. It contains numerous external URLs, with one specifically appearing as a redirector for a search term, suggesting an attempt to trick users into visiting a malicious site. The PDF structure and embedded URIs are consistent with phishing campaigns that leverage link farms to obscure the final malicious destination.

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 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
  • 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://druttle.ru/123?utm_term=lipstick+stun+gun+price PDF link annotation
    • http://lienforkid.com/37866462042edq0n.pdfIn PDF document text
    • http://reawont.online/655686919476nalj.pdfIn PDF document text
    • https://donimafu.weebly.com/uploads/1/3/5/3/135395233/ad6f659b84e52.pdfIn PDF document text
    • https://jaweditulopo.weebly.com/uploads/1/3/4/3/134313576/0b1290086f925.pdfIn PDF document text
    • https://gejiraje.weebly.com/uploads/1/3/2/7/132740564/pifefuxiduje.pdfIn PDF document text
    • https://cdn.sqhk.co/fasotaluvose/b5QYegd/43965619854.pdfIn PDF document text
    • https://koxabiwepa.weebly.com/uploads/1/3/4/3/134309970/dulajiz_zifibemovavaf_sexuxojakulikev_dosesonodame.pdfIn PDF document text
    • http://cyberlife.store/robot_walking_sound_effect_freec3fa0.pdfIn PDF document text
    • https://cdn.sqhk.co/tisewesir/SijkAjf/vemarojopadazilugira.pdfIn PDF document text
    • http://getveran.site/bapowavevituzc364.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450719/normal_60240b9667c62.pdfIn PDF document text
    • https://rizigavitud.weebly.com/uploads/1/3/4/5/134581125/ruzul-gudanun-garitolesutizer-buwodifizowuzug.pdfIn PDF document text
    • http://daravto18.ru/12558611420n5zub.pdfIn PDF document text
    • http://creditscoretrack.info/80877622452xwxll.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/povelenavuviw/razevatefoxuvawixovitu.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/dovukinem.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/chigurida_kanasu_kannada_movie_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/chest_vte_guidelines_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/photo_video_locker_calculator_apk_free.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_off0000dab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB0 4864 bytes
SHA-256: d045890c850399aaabee56890a1f8bf5fa84ed37ec82a6cad51c9e41070d7875
font_01_sfnt_off0000eb5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5C 10512 bytes
SHA-256: fbcbb61caef4160b6f5912d4211257eceecd036c1bf511447e2f724c385243e7

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