Malicious PDF — malware analysis report

Static analysis result for SHA-256 34e16f5309809ba8…

MALICIOUS

PDF

73.7 KB Created: 2020-11-24 10:16:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: a2885ee88ab0a44e8df65e6d93513273 SHA-1: dc40f6b7c8b7b6d4890b3d7ea9fa9ce9c4c4ba76 SHA-256: 34e16f5309809ba80011fa4d4c8b2870721de1dc381a698149dd654854638bca
156 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 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 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.
  • 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://trafftec.ru/strik?utm_term=frackin+universe+isogen PDF link annotation
    • https://rajaxamakato.weebly.com/uploads/1/3/2/3/132302926/4183132.pdfIn PDF document text
    • https://dubuzosokiboxof.weebly.com/uploads/1/3/1/1/131163723/5032668.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370525/normal_5fb7ffe54a361.pdfIn PDF document text
    • https://zitilegog.weebly.com/uploads/1/3/4/5/134501444/zozituvajaz_katanof_xupiwixego_xoraxixuzili.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372085/normal_5fb2530615c92.pdfIn PDF document text
    • https://vavapeta.weebly.com/uploads/1/3/4/8/134848771/fefewexenaxomak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464541/normal_5fa42dffab44c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382192/normal_5f8fd7a48c1bb.pdfIn PDF document text
    • https://fadusoga.weebly.com/uploads/1/3/0/7/130739873/dezasujul_kirolowepepuvab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388412/normal_5fb46ff5ebfec.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/8a69b6f0-1531-4777-8586-eb8e4a7db624/vetetamesusu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04bc7e1e-20dd-4ca6-a03e-9b927a4a1c52/death_of_a_moth_annie_dillard_summar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e96fcf9c-cde0-4168-a2da-27b4e10db500/vusen.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_off0000e39d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE39D 5012 bytes
SHA-256: 71a9d6cd10c759940806058e56ae0d98371d5e4a2ea7b29582db4a6cf5eb4a66
font_01_sfnt_off0000f4c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C8 11236 bytes
SHA-256: 70f927b5d5c1239d951f1a72cc75ba71a622c5d947202a8e5b5a4973a31aa4b8

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