Malicious PDF — malware analysis report

Static analysis result for SHA-256 12df948bdb78d649…

MALICIOUS

PDF

66.9 KB Created: 2021-02-18 12:32:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e60e500524e64ae4c8de0e5ab8058353 SHA-1: 218ff4b6582223aac8f18e92ed5a038262d73cc1 SHA-256: 12df948bdb78d649d1c76904bbbec52da1ef93d734613a8cbef5407cc2957b4b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. Numerous embedded URLs, many pointing to link farms and disposable hosting, suggest a phishing lure designed to redirect users to malicious sites. The PDF's structure and the presence of multiple external URIs strongly support this attack pattern.

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://bologen.ru/aws?utm_term=funciones+trigonometricas+fundamentales+y+reciprocas PDF link annotation
    • https://supeneti.weebly.com/uploads/1/3/2/8/132815050/gaxexirazusotipuv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368481/normal_5fc98bcc62c01.pdfIn PDF document text
    • http://table-wait.com/54614369563tla6l.pdfIn PDF document text
    • http://alifan.store/fusotibupufejxvq55.pdfIn PDF document text
    • http://amandeepsadyora.com/wumilucs0sh.pdfIn PDF document text
    • http://discovljzg.fun/vitubobobirezanaaipar.pdfIn PDF document text
    • https://wovigapugup.weebly.com/uploads/1/3/2/7/132710676/5124585.pdfIn PDF document text
    • http://itali-big.space/5334341075436cgs.pdfIn PDF document text
    • https://cdn.sqhk.co/zalopubid/cYIidU9/dobolexamowurewijazi.pdfIn PDF document text
    • http://sosed.market/3ds_max_for_mac_crackcecjn.pdfIn PDF document text
    • https://cdn.sqhk.co/kurotevu/dgezlnc/lisopipojosila.pdfIn PDF document text
    • http://probnik1313.tech/25258581563jda73.pdfIn PDF document text
    • http://opensalon.xyz/free_photography_website_templates_html5v0srd.pdfIn PDF document text
    • http://gogotmif.space/agung_bali_tour_guidegs45z.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/makumapikeze/que_es_composicin_literaria.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_off0000c46c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC46C 5532 bytes
SHA-256: f340f7114e0d7a707252910b9c6ab289dd0ab4b410b59ecbb5f5bf81f7d9972b
font_01_sfnt_off0000d735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD735 11956 bytes
SHA-256: 41991f3f59081675d317d0c5478941da1fc2a10c581d63a996985a33e43b4784

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