Malicious PDF — malware analysis report

Static analysis result for SHA-256 0612e52804916b5b…

MALICIOUS

PDF

68.1 KB Created: 2020-11-26 06:04:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a7efc7791441575cbc0abe5d67e4f7c SHA-1: 5b69a8227944421be817c96a967980ea3f9414fc SHA-256: 0612e52804916b5b3a450c06dba1c2e1805c50a8e211d84af1f3bad4f8ccfc7a
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The presence of numerous external links suggests a link farm or phishing campaign designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/123?utm_term=the+near+witch+synopsis
    • https://cdn-cms.f-static.net/uploads/4484999/normal_5fb48588834a2.pdf
    • https://cdn-cms.f-static.net/uploads/4367017/normal_5f8fe46b54c5e.pdf
    • https://cdn-cms.f-static.net/uploads/4369762/normal_5f89cfac39845.pdf
    • https://cdn-cms.f-static.net/uploads/4393638/normal_5f972d7cdd90a.pdf
    • https://cdn-cms.f-static.net/uploads/4451945/normal_5fac280013e1e.pdf
    • https://cdn-cms.f-static.net/uploads/4374532/normal_5f8f24220dd2e.pdf
    • https://zipalusub.weebly.com/uploads/1/3/4/3/134343211/8576747.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/degagaziv/18486640313.pdf
    • https://s3.amazonaws.com/teximikamukubo/last_shelter_survival_mod_apk_unlimited_diamonds_2019.pdf
    • https://uploads.strikinglycdn.com/files/b05a669b-49d7-4334-bb95-888ec7efd95a/fujitsu_fi-6770_service_manual.pdf
    • https://uploads.strikinglycdn.com/files/616d84be-459e-4fe9-b2e9-08f685105f65/fadogafip.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf1b.bin
5e4f0e7f05549119cce840293d02011a19e26ef8f90e570f64b3af212ca3ba5c
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF1B 5132 bytes
font_01_sfnt_off0000e0a2.bin
345b42bb2ce7240caaf959d90248f6239e8c8153b0405ce4a445fe88e405b39a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A2 10368 bytes