Malicious PDF — malware analysis report

Static analysis result for SHA-256 5080394f647be074…

MALICIOUS

PDF

72.5 KB Created: 2021-02-15 00:34:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 2c539098c3db315c2e3e9b5969cca399 SHA-1: e55840857a1ced001a20ff600d9a2b04e5996c3c SHA-256: 5080394f647be07494694a8f4bec7bb4f1d0325d735b6d8f6d2c1a00c71437e6
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable hosting, indicating a link farm or spam campaign. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to potentially malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/123?utm_term=facts+about+artemisia+gentileschi PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375708/normal_6012b0ed6b96e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378613/normal_60288e5411d80.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481552/normal_5fcb476827696.pdfIn PDF document text
    • http://surisetufuna.iblogger.org/27427985277.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465704/normal_5fcebd07b0dc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466411/normal_60117c0a67cce.pdfIn PDF document text
    • http://mif-smeh.space/crack_bones_in_backca3tc.pdfIn PDF document text
    • https://sojabejob.weebly.com/uploads/1/3/4/8/134890412/kigafekapo-vejapove-wususipumojopav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485939/normal_601580ff95a97.pdfIn PDF document text
    • http://wowitaly.space/pozonitisuvix481yf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402721/normal_60040a973897a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403948/normal_6007e237d1335.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367919/normal_5ffb893dd3f17.pdfIn PDF document text
    • http://chambrely.xyz/android_recyclerview_scrolltoposition_not_working0hq7s.pdfIn PDF document text
    • https://fexaxotira.weebly.com/uploads/1/3/5/4/135401388/4289923.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485718/normal_600ee906817fc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nipalarinab.epizy.com/sajuga.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/17958948249.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_off0000dc03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC03 5308 bytes
SHA-256: 24ad597d45f23508bfd73db62ef8010939439936f698eb248b1bb42af2b86b0c
font_01_sfnt_off0000ede6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE6 11172 bytes
SHA-256: da8d3a8dad1c7de1a4393d7cddd3439cd211083b4f5d6536d823f0bcf57b113d

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