Malicious PDF — malware analysis report

Static analysis result for SHA-256 e907de1c68b2f32a…

MALICIOUS

PDF

72.8 KB Created: 2021-01-13 18:41:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 43645eee8e69ae7bd9df3751cbbc0753 SHA-1: 91ef03c94d96cad6b08b42574cd854158b7eee87 SHA-256: e907de1c68b2f32abadc11d4e8de6c14722aa65973f3a5e276d0bd79ca0b6df3
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a large number of embedded links, many pointing to disposable domains and redirectors, indicating a link farm or phishing attempt. The embedded links are designed to redirect users to external sites, potentially for malicious purposes such as credential harvesting or malware distribution. The ClamAV detection and ML classifier further support its malicious nature.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/123?utm_term=which+jcpenney+stores+are+closing+in+maryland In PDF document text
    • https://fejamelaluboj.weebly.com/uploads/1/3/4/3/134311679/muvasewabezemi.pdfIn PDF document text
    • https://danawejenig.weebly.com/uploads/1/3/4/4/134499985/496681.pdfIn PDF document text
    • https://nefupoxuwuridek.weebly.com/uploads/1/3/4/7/134747690/wumiginigar_donotezap_folig_xonaxepagowodu.pdfIn PDF document text
    • https://ruwuzeget.weebly.com/uploads/1/3/4/7/134755445/1765829.pdfIn PDF document text
    • https://zifizegesug.weebly.com/uploads/1/3/4/7/134719454/8288697.pdfIn PDF document text
    • https://nepokotivo.weebly.com/uploads/1/3/2/8/132814168/3072045.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369311/normal_5fb357c2d2c48.pdfIn PDF document text
    • https://tekegalesi.weebly.com/uploads/1/3/0/7/130740489/73f97d5e99fdb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447877/normal_5fe006fdb7f88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373517/normal_5fda4a918d4c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376086/normal_5f94ca5c94425.pdfIn PDF document text
    • https://site-1229287.mozfiles.com/files/1229287/teleportation_circle_3__5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392668/normal_5fa768ca379f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417045/normal_5fcb1ac32f72d.pdfIn PDF document text
    • https://karozazosepi.weebly.com/uploads/1/3/4/3/134316788/8284884.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468531/normal_5ffe6fa15b3ec.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000de81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE81 5680 bytes
SHA-256: 207470994e9f6cfefd2136b2b18990a56c91bb19fb970ea1f0c650fd4fd79826
font_01_sfnt_off0000f1ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BA 10768 bytes
SHA-256: 3edd48636374bd6dc87dd235f7d322aed3769e5b2e52a3f4ef82fdf44a5491f1

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