Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ed6f6a71f49cd90…

MALICIOUS

PDF

75.6 KB Created: 2020-11-26 07:26:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d5ea04fc4531f165f49e87ef3fd4ad4c SHA-1: d3ff02cd2b67edcaf44dd32f8367b77e55b9f96f SHA-256: 3ed6f6a71f49cd907569c66e7b359ab96b88d01de182c51490746bacb94b0b68
206 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. It uses a callback-phone (TOAD) lure. 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 0.9997

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://trafffe.ru/123?utm_term=guaranteed+payday+loans+direct+lenders PDF link annotation
    • https://buminezavo.weebly.com/uploads/1/3/4/6/134650892/67d7f6a5.pdfIn PDF document text
    • https://dumopodowejuna.weebly.com/uploads/1/3/4/5/134591879/tewoli.pdfIn PDF document text
    • https://tanaxigurav.weebly.com/uploads/1/3/4/2/134266775/denesanijibep.pdfIn PDF document text
    • https://sixonawujow.weebly.com/uploads/1/3/4/3/134369174/124092.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373239/normal_5fb8f787e4219.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367283/normal_5f875d562a442.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409610/normal_5faacb1fced4c.pdfIn PDF document text
    • https://fupobemoxu.weebly.com/uploads/1/3/4/6/134669325/tarugotutit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447877/normal_5f9db413deea2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421641/normal_5fa2dd0badf47.pdfIn PDF document text
    • https://zogeliwev.weebly.com/uploads/1/3/4/3/134353139/sanogajanuvupa-nukupe.pdfIn PDF document text
    • https://nokesopupikes.weebly.com/uploads/1/3/4/7/134767934/woxakofemuvawaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/sizilisaxubup.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A1 5200 bytes
SHA-256: c86a1be29267b4fd6ed2025942eb4d06c2d6a3922ea931f77c384032f8ecaa28
font_01_sfnt_off0000e56c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56C 11256 bytes
SHA-256: 5565d0b30acb3658716608191b484569a973f18fdfb9387c0d5403a75e6670e3
font_02_sfnt_off00010be5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE5 16208 bytes
SHA-256: 560e11d5da3ed60647d844d0127c34f4fbbc0b68999cbe35161ddcd790341c9f

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