Malicious PDF — malware analysis report

Static analysis result for SHA-256 206fc1237892b2a6…

MALICIOUS

PDF

69.8 KB Created: 2020-12-07 23:42:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 397b92e53e4436892ce8ceb514d080d8 SHA-1: 20895db1c564a254386777a68bbcdf79ff7597c1 SHA-256: 206fc1237892b2a6438dd831d4aa8dc17632e35b33ce3bb6a403f3e5ed8b3056
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on platforms like Weebly and Strikingly. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious or spam content.

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://trafffi.ru/123?utm_term=honey+smacks+cereal+ingredients PDF link annotation
    • https://xexezakofiwojuv.weebly.com/uploads/1/3/4/3/134372147/4961886.pdfIn PDF document text
    • https://sidutoxa.weebly.com/uploads/1/3/4/8/134886075/nijolabomaraw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377388/normal_5f9aad840c18c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366343/normal_5f8788f679d9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472773/normal_5fa4bf42611b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447466/normal_5fb4ebcb8ba6d.pdfIn PDF document text
    • https://batigagonu.weebly.com/uploads/1/3/4/7/134774980/7ddcff14019e3b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373297/normal_5fb31bebb0f8a.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/e987843c-3372-4985-80e6-b42b3e1c2375/45549756519.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51fc58f8-7040-49e1-b280-5da939deec96/pokemon_korosu_deoxys.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c162085bf90c0efc5341/t/5fc0e8d64e98326c0231a00c/1606478038696/actex_study_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5f1b7acac6192ab87ae9/1606377245600/pill_maker_00.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc55bc327a199023ad316a3/t/5fc8ae4aee804a17a1d74817/1606987338581/wezodobekinazovigefexoxoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/032e4112-230a-40b2-a853-53e0f700f1c7/saber_conjugation_past_tense.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c666116eb00e3c4b5099/t/5fc2339df81c9a2a0ceb5370/1606562718117/semotamovugafag.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_off0000d171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD171 5388 bytes
SHA-256: 56e86a702a99532fc0d7fb63008a5d2f42a64fdf65801826a94d79a46b4cb731
font_01_sfnt_off0000e3b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B1 11312 bytes
SHA-256: c8ebcfbe65404c08e636da4c103299f42a6d665283cc997dd7e13be50b70e756

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