Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5a87d0ca6184a3a…

MALICIOUS

PDF

79.3 KB Created: 2021-02-14 17:47:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7e1658709e37dc423f6b8a52363da504 SHA-1: 57cb246a4b346776ef4906f9464b2562ed762694 SHA-256: f5a87d0ca6184a3a83ff9a13b5fe314b56829897aea0d006a22c6081785ad594
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://jacksth.ru/wix?keyword=spider+man+far+from+home+free+movie+stream PDF link annotation
    • https://cdn.sqhk.co/someteku/PXhfgfZ/80586910676.pdfIn PDF document text
    • http://buvemalo.66ghz.com/61112545580.pdfIn PDF document text
    • https://cdn.sqhk.co/dalegoti/gx3gjja/slot_cars_sold_near_me.pdfIn PDF document text
    • http://makeyourself.xyz/bittorrent_filehippo_freekk7cf.pdfIn PDF document text
    • http://govnosiakxws.online/nowojikupefafabibisiuye.pdfIn PDF document text
    • https://cdn.sqhk.co/wofosavafiju/OT8zxia/how_to_decorate_a_cake_without_powdered_sugar.pdfIn PDF document text
    • http://fenellalucynelle.info/ribonedopanodutagjgz6e.pdfIn PDF document text
    • http://vzruvayarttraff.xyz/81456517970uil1r.pdfIn PDF document text
    • http://picsonair.com/ximazataxewuporuxubusolok44k.pdfIn PDF document text
    • https://cdn.sqhk.co/wufevinek/aijliia/41026539136.pdfIn PDF document text
    • https://cdn.sqhk.co/ralapogifur/Sjfiihh/skyfolio_onedrive_photo_gallery_and_upload.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wizitifowubux/6002051774.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/como_hacer_un_plan_de_mercadeo.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF8 5200 bytes
SHA-256: 1978217a7bc22be267549c406c0a605a86b68c1d8e9de0aed1c1abb86b54c3f9
font_01_sfnt_off0000fd72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD72 10720 bytes
SHA-256: 1e7dcf2b8960a36eaf40666f75d409d68cf734224f3ab8424b011fa8db277c62
font_02_sfnt_off00012216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12216 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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