Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8c6f91d225ec103…

MALICIOUS

PDF

81.0 KB Created: 2021-03-10 08:46:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 964e654852ec83b9c84b9094250f74d0 SHA-1: 13ecb303c09f11abb23a4756e44ba05f184be0f5 SHA-256: e8c6f91d225ec103207843b8082ad0c792395ba94f1786132ef55d9deae7f774
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 0.9998

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://soxebez.ru/wix?keyword=detroit+axle+struts+vs+monroe PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452193/normal_5fd910e4d1c9a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495246/normal_5fc5e85898afb.pdfIn PDF document text
    • https://remezimivof.weebly.com/uploads/1/3/4/5/134582621/05931c06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444377/normal_5fe64aa7a8c93.pdfIn PDF document text
    • http://padugozerur.22web.org/project_risk_management_examples.pdfIn PDF document text
    • https://sefewazugep.weebly.com/uploads/1/3/5/2/135293251/1f2a8b06858.pdfIn PDF document text
    • https://nabusaguvelono.weebly.com/uploads/1/3/4/0/134095838/523090.pdfIn PDF document text
    • https://norofuzalugegok.weebly.com/uploads/1/3/4/8/134882219/xekom.pdfIn PDF document text
    • https://gupekuvexo.weebly.com/uploads/1/3/4/6/134610658/zaratojaluxob-jekakadojigev-tifukaniteri.pdfIn PDF document text
    • https://povefedonigo.weebly.com/uploads/1/3/1/6/131637150/4858929.pdfIn PDF document text
    • https://woxoxoba.weebly.com/uploads/1/3/4/8/134893248/pevula.pdfIn PDF document text
    • https://ripaduwik.weebly.com/uploads/1/3/5/3/135311581/5781432.pdfIn PDF document text
    • https://jewesorovusupim.weebly.com/uploads/1/3/6/0/136092124/8f8d6d0772bbd15.pdfIn PDF document text
    • https://libigidibejaxa.weebly.com/uploads/1/3/3/9/133997225/sumagaxo.pdfIn PDF document text
    • https://jeletizasi.weebly.com/uploads/1/3/4/6/134640559/nidolubox_rawuna.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://uploads.strikinglycdn.com/files/03f57a30-fd78-4a31-b30a-7830d9452695/at_the_mountains_of_madness_similar_books.pdfIn PDF document text
    • http://tanofekomom.epizy.com/bhagavad_gita_chapter_3_sanskrit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0adae28b-23f3-4b3d-aa65-06643410a4df/how_to_make_a_fall_peasant_dress.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_off0000f4f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F8 4840 bytes
SHA-256: 0d289a7a5f0f1d4b2cddc609025c31f78739301b94502d62dac4b7905cdd3051
font_01_sfnt_off00010558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10558 10444 bytes
SHA-256: dcbef7b8d53c3d93286b89f96c5dfb2dfdc9837a468364a24d90a55b11c6b888
font_02_sfnt_off000128ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128FF 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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