Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed8eeeff5ea24547…

MALICIOUS

PDF

108.7 KB Created: 2021-03-19 21:56:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 9ca1923f3b8266db60ab1a8ff1ff5d38 SHA-1: 2b9b2ab32c63bd75cda5373e6b82df76d217a5c1 SHA-256: ed8eeeff5ea24547c3b2e42b3dd88be2f2ab4f3c3342ab71233c4a4def0e084f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting and employing UTM parameters, indicative of a link farm or SEO manipulation tactic. ClamAV and ML classifiers strongly flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://zajinet.ru/wix?keyword=persona+social+links+ranked PDF link annotation
    • https://cdn.sqhk.co/linewebozid/jjpgetx/criminal_case_lookup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456114/normal_6048ea44cb7da.pdfIn PDF document text
    • https://cdn.sqhk.co/jiguluzufuwa/ghjkjaj/48464736545.pdfIn PDF document text
    • https://cdn.sqhk.co/zopizote/KljaidY/kugife.pdfIn PDF document text
    • https://cdn.sqhk.co/gijimexuv/Lj63gji/dj_marshmello_face_reveal.pdfIn PDF document text
    • http://sajulakukomokas.22web.org/dijokubekaxu.pdfIn PDF document text
    • https://cdn.sqhk.co/guledijuxi/ijhegg3/are_seasons_the_same_worldwide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486997/normal_5ff229d04812e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfd81441-f382-44d3-a605-4022d0c7a165/how_long_to_cook_turkey_in_rotisserie.pdfIn PDF document text
    • http://kejagabato.myartsonline.com/criminal_justice_system_reviewer.pdfIn PDF document text
    • http://nununad.myartsonline.com/excel_vba_range_find_multiple_criteria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/105d2d8f-d773-4800-8674-0509012700ea/47360627003.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35d005c9-76b4-4d6c-887a-edbc72d743cf/top_5_time_management_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f1b1d7b-5b99-44aa-b160-4e666d6dc1ab/dozedujoluvepag.pdfIn PDF document text
    • http://betizig.epizy.com/full_form_of_hd_bolt.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014c9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C9E 3720 bytes
SHA-256: 025a4c46fe8bcd6f5f39c879058513d3e22fead5a2f458c26e762517492e7c37
font_01_sfnt_off000159c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159C1 4996 bytes
SHA-256: b5db2b8d7eb808662a4d239868f2ea4f5d3e7f8b2b2af2d3854016afad5a5c0d
font_02_sfnt_off00016ac6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AC6 10660 bytes
SHA-256: ab0bb8ea48aa5d66f5f5d13bb4ba7b8767f47fb33ca68c065db7d2892517fea2
font_03_sfnt_off00018f9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F9E 16348 bytes
SHA-256: 4d0700c2bed8ae31e296ea143d862b5f4c90f99d2dd4e3a41f3daee297692574

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