Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0195f7b8b85994c…

MALICIOUS

PDF

97.2 KB Created: 2021-03-25 01:17:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a595618bfdc9c42196304990344505bd SHA-1: b17b1fdb4a93251af2247252ef0dc4bf323a2ba3 SHA-256: c0195f7b8b85994c5be585e4c89f2a60f1785fa539df3cf1160b7866ae59a2b3
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/strik?utm_term=john+deere+250+turbo+skid+steer+engine PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450516/normal_5fdfc49d1b751.pdfIn PDF document text
    • https://cdn.sqhk.co/batumozi/AghVfhg/jowawudi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470835/normal_5fd63d5c84995.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484993/normal_5fdb7ec751538.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381547/normal_5ff1cfcf67a80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465403/normal_602b67a4a0b59.pdfIn PDF document text
    • https://cdn.sqhk.co/katutilit/jhPm38N/kedimamemimifeneredej.pdfIn PDF document text
    • http://wejuveziwep.mypressonline.com/adverbs_worksheet_grade_2.pdfIn PDF document text
    • http://subuxiwubemew.getenjoyment.net/evangelio_de_tomas_apocrifo.pdfIn PDF document text
    • http://kafalukuwemi.mygamesonline.org/xubekabavewe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://883cd1dc-02d0-4059-8fa2-99201f92b631.filesusr.com/ugd/6166c9_dfb8ecd4454c466496d6e4c85272c2a6.pdf?index=trueIn PDF document text
    • https://b6de9e3f-c562-4e05-b5ee-70895c8060ae.filesusr.com/ugd/3801ff_2e2613921c434fb397efc01c1e1b1be6.pdf?index=trueIn PDF document text
    • https://981168d4-05fc-44b6-871d-73371d7e8cf1.filesusr.com/ugd/87d215_adde336a7bfe4302875add0004101530.pdf?index=trueIn PDF document text
    • http://sovogezo.atwebpages.com/how_do_you_fix_a_pegasus_bathroom_faucet.pdfIn PDF document text
    • https://e4034479-4ead-418b-af8c-5be8dc72bdbe.filesusr.com/ugd/1e8759_10ea3969dbb74f129f75d431085c57ea.pdf?index=trueIn PDF document text
    • https://31f314b5-0768-4c24-bd49-4596ea953b46.filesusr.com/ugd/85a4b1_863e59ad9dd04911b5896d9410bc448a.pdf?index=trueIn PDF document text
    • https://234a0c07-d908-4261-bb83-16b3c96a9b04.filesusr.com/ugd/73e0e6_fe90f3e3fb114eb18e5a9da380c912a2.pdf?index=trueIn 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_off00014072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14072 5436 bytes
SHA-256: c06828940a1674eb79f72bb76455ecd30b73c7921a87b5961e946d436c01b8b8
font_01_sfnt_off000152e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152E7 10592 bytes
SHA-256: 228e8274c898f4b445b215673e04e04dd52a66d1abb9be7fb0a30ae1716a10cf

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