Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d2379a5381c8c23…

MALICIOUS

PDF

76.0 KB Created: 2020-11-10 11:14:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 11b01610fdaeaf625e3a7f0451503c3f SHA-1: 9b862a722b4240c9f315990eec04c1cb002040e0 SHA-256: 2d2379a5381c8c238b66cee5f55898b096466196d341062605371a18b153212e
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable hosting and redirector services, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to malicious content.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?keyword=blank+coat+of+arms+shield In PDF document text
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/6716fe73835.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375694/normal_5f8a13dfe4a13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370090/normal_5f9612fbb5ef9.pdfIn PDF document text
    • https://dudezixibuwido.weebly.com/uploads/1/3/4/5/134529197/4296663.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384836/normal_5f91ecb062226.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/palaj_xofepevez.pdfIn PDF document text
    • https://jakemujilofadam.weebly.com/uploads/1/3/1/3/131380171/c7baaf961e7d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423714/normal_5fa17ad583ce9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419198/normal_5fa2119b3e70d.pdfIn PDF document text
    • https://diriremipujuna.weebly.com/uploads/1/3/4/2/134265666/wejifadu_mobabo_pikapamet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389387/normal_5fa182bb13905.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459630/normal_5fa50d4748fe9.pdfIn PDF document text
    • https://pisanofinupu.weebly.com/uploads/1/3/1/4/131437881/4c4179e0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471230/normal_5fa7c65794bfe.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/8cb93f16-4253-49f1-b37b-dcd80676caa2/30570585880.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44d17122-6327-44d4-9e48-864652328610/wuteriruke.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED16 5376 bytes
SHA-256: 732d289c82ee7bbaef5cada1d738d33538f59c42325678a047e7512ce813993d
font_01_sfnt_off0000ff35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF35 10740 bytes
SHA-256: b193bd7c4afb1b5c6baa5f6acdc1067d11891d1e0d27d6cb03af9413f270f372

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