Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ca5a8396003c7f6…

MALICIOUS

PDF

83.0 KB Created: 2021-05-10 06:56:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 104f449c1cf627873fd02f38282f2d1c SHA-1: 20a931c355e68430d83eb59c6fd339420b14eb8d SHA-256: 9ca5a8396003c7f62fac1a0852be71cede8ab03d61f35d759da8e7f0ae6dbe7a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample was flagged by ML and ClamAV as malicious, with heuristics indicating it functions as a link farm on disposable hosting. The embedded URLs, such as https://golowaki.ru/strik?utm_term=2d+face+on+3d+model+blender, likely lead to phishing or malware download sites. While no scripts were explicitly extracted, the PDF structure and malicious URL patterns suggest an attempt to redirect users to malicious content.

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://golowaki.ru/strik?utm_term=2d+face+on+3d+model+blender PDF link annotation
    • https://xudepafuvinuk.weebly.com/uploads/1/3/0/9/130969511/4d5f31bba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384299/normal_601afeeab3737.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479688/normal_602f1ab27ac0e.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/what_is_problem_solving_approach_in_social_work.pdfIn PDF document text
    • https://birisudim.weebly.com/uploads/1/3/4/4/134467091/9261332.pdfIn PDF document text
    • https://rixedevo.weebly.com/uploads/1/3/5/3/135306589/lakilawob_tawexelopakigi.pdfIn PDF document text
    • https://faboduvo.weebly.com/uploads/1/3/5/3/135343103/feref-xikavowez-goxevofevufi.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/wesezuzuvalirik/software_functional_requirements_specification_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/nursery_rhymes_emoji_pictionary_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/59305448428.pdfIn PDF document text
    • http://zubiluwetij.myartsonline.com/vixemifexomikifuxufigi.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/rt-n66u_merlin_vlan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6730d59c-fbf0-4bd6-9840-8f9e558e20ea/66963144275.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/tubologebuvewe.pdfIn PDF document text
    • http://fegoluvarelewum.myartsonline.com/blender_sculpting_tutorial_beginner_2.8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e05a4e0-d91a-41a1-8071-c897900bb12f/ted_chiang_stories_of_your_life_and_others_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a5c0f81-e979-4a5e-bbb2-828d0129e6ab/rapafotireximufonexowim.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_off00010815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10815 5328 bytes
SHA-256: 60e67d676d716a640dddd2936f1581f8af8799b7ed52d5a7d5cec2b2778bfc62
font_01_sfnt_off00011a1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A1E 10884 bytes
SHA-256: a4971095f88112f2d3a87c8b992d5c7828391cb9b06d4b36e281903696dd18f4

Open this report in the interactive analyzer, or submit your own file for analysis.