Malicious PDF — malware analysis report

Static analysis result for SHA-256 dce606a96471a186…

MALICIOUS

PDF

75.0 KB Created: 2021-02-27 07:35:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 76d7ace7ff1dbe755635b4e51bc45b56 SHA-1: bf40a955757d3fdb3ec1e53891951f55fca66c01 SHA-256: dce606a96471a18651d1c0e449009acb2dc31b6ecb7e1e2185e7fc2c68097e35
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded links pointing to external websites, suggesting a phishing or malware distribution scheme. The presence of multiple disposable hosting domains and link farm heuristics further supports this assessment.

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 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://lozipotod.ru/award?keyword=how+long+do+you+cook+sweet+potatoes+in+a+pressure+cooker PDF link annotation
    • https://moxamegok.weebly.com/uploads/1/3/3/9/133999551/relubero.pdfIn PDF document text
    • https://buzapakamewogu.weebly.com/uploads/1/3/4/3/134366326/9362b5be.pdfIn PDF document text
    • https://cdn.sqhk.co/puxolika/jiKqQuu/khutbah_nikah_in_arabic.pdfIn PDF document text
    • https://cdn.sqhk.co/xujurovemu/jWQkPhe/42577774863.pdfIn PDF document text
    • https://fumabufoduf.weebly.com/uploads/1/3/5/3/135313851/440e7c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404520/normal_602eaacc411a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470038/normal_6031e6cd24dcb.pdfIn PDF document text
    • https://funosojo.weebly.com/uploads/1/3/5/3/135336125/vazowubu.pdfIn PDF document text
    • http://trokot-newshop.online/nj_transit_bus_freehold_to_nycc4bnh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469353/normal_6012c4448f17f.pdfIn PDF document text
    • http://goshop32.site/lugegapajidujijibefodwpmd7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472486/normal_5ffe80ed4693d.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/falufusu/78480873466.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/kufavutotuwesi.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/52065313436.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/outer_worlds_pre_order_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/zijubumesunuwonefitaw.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED10 5460 bytes
SHA-256: 23e8aed69cd99b7e28d1a9a5d63f92ba6e4a12268ee27d66abea76aa666d6d09
font_01_sfnt_off0000ffcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCB 10408 bytes
SHA-256: 9d4fa3eb7307df4555d32773dcb90de9df0f01880df8ccf91b16f05ccd06801f

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