Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d73454862af8141…

MALICIOUS

PDF

72.4 KB Created: 2020-11-19 16:53:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ac05ad03a6c00b4a50add8727847eeaa SHA-1: 9d144ed76643509ae209aa996681fb3b85765f1a SHA-256: 3d73454862af814112c48ec5f7c1aa9132f40ced03f1911260226388a9fcde4a
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://traffking.ru/strik?utm_term=kutools+pour+excel+2007+nom+de+licen PDF link annotation
    • https://dajexave.weebly.com/uploads/1/3/4/3/134352807/zinelo-ruzodime-pezefa-gumujedalesifig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374364/normal_5f98e348a0f30.pdfIn PDF document text
    • https://zabagazepag.weebly.com/uploads/1/3/4/4/134498959/4324708.pdfIn PDF document text
    • https://depoferi.weebly.com/uploads/1/3/4/4/134445349/ef4cdac.pdfIn PDF document text
    • https://komulobuzol.weebly.com/uploads/1/3/4/6/134618259/jutaguzulerusu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366042/normal_5f89e91a953f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465393/normal_5fa4bff24ca6f.pdfIn PDF document text
    • https://sazojowob.weebly.com/uploads/1/3/4/3/134351878/717951744c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405945/normal_5f9a4b9ba99bf.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/3718456.pdfIn PDF document text
    • https://zosupexaduj.weebly.com/uploads/1/3/0/7/130738593/3b9adb751439.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481527/normal_5fb4bb06deddd.pdfIn PDF document text
    • https://raxabebawozovi.weebly.com/uploads/1/3/4/3/134311701/pakixebanewomerano.pdfIn PDF document text
    • https://xusawoji.weebly.com/uploads/1/3/0/7/130739635/zezozuzupa-kejanase.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/99437206-e6c1-47b8-b497-1c758e1a4667/noticias_en_voz_pasiva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fc7661e-1a89-4e3d-bcea-bb47c65b54e9/learning_about_dance_nora_ambrosio_p.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_off0000cb98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB98 5284 bytes
SHA-256: e4ca59dbf5cf516e7e6c5cc1eaf2a624885bc0d1cde9a6d0fdcbf77607557cf1
font_01_sfnt_off0000dd92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD92 12408 bytes
SHA-256: 3d7da28dd4fb11d065d7e6a95acf2fc6f230da8fe1d786e231a592fdecc425d5
font_02_sfnt_off000104c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C3 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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