Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f17f5f053e8adab…

MALICIOUS

PDF

133.6 KB Created: 2020-12-16 09:32:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 8d567811ba04b62c7f943943676aa5aa SHA-1: da15a4140037b8e491a992a56e562c867f63d3a2 SHA-256: 5f17f5f053e8adabe20a573096587bf95102971f11b48e322e73951ed4921c40
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9990

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffine.ru/strik?utm_term=social+penetration+theory+stages PDF link annotation
    • https://pejilajapife.weebly.com/uploads/1/3/4/4/134477767/720bf12e644.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388422/normal_5fb6cd9441b6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481516/normal_5fbeeb56f177b.pdfIn PDF document text
    • https://tadinitalu.weebly.com/uploads/1/3/4/7/134744808/02424027f692.pdfIn PDF document text
    • https://xazojitov.weebly.com/uploads/1/3/1/4/131408465/84da3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5fd18d93dbd65.pdfIn PDF document text
    • https://panatomovedo.weebly.com/uploads/1/3/4/6/134688712/wotopodofoze.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495265/normal_5fc7a9532fd58.pdfIn PDF document text
    • https://mumixopid.weebly.com/uploads/1/3/1/8/131872042/bewobabotidigeb_tunenijidivazuf_matafeme_tipisiditenevaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408587/normal_5fafab64e4ef4.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/votuweroxigezog/army_manual_dispatch_forms.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7b75f8b9e860b7b22cb6b/t/5fcbb59d9cf56e0e8b17bf3e/1607185821769/60177904672.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e981c20f-d049-4027-bdce-595f60fc3af8/31782415073.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/20721857045.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_off0001ac4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC4A 5188 bytes
SHA-256: 614a8c3b611db3d3e46ab870980feada05f20914ac2f2c16121304d66ac0db39
font_01_sfnt_off0001bdce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BDCE 11216 bytes
SHA-256: 13b45ff7052e1711a9d3a4f2d5f67ee9162179202a18829b4819d30a4583af2c
font_02_sfnt_off0001e431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E431 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90
font_03_sfnt_off0001f8c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F8C8 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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