Malicious PDF — malware analysis report

Static analysis result for SHA-256 149db66b54e6d7c6…

MALICIOUS

PDF

72.3 KB Created: 2021-01-05 06:51:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a495be1826e215d9dec8079d91539022 SHA-1: eb969d4e721a45b7ba312364b41c457c8ed31ef0 SHA-256: 149db66b54e6d7c685a45277f28d88301a4a8c99d491c0fb5256ba77e709ab86
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document exhibits characteristics of a phishing or scam campaign, evidenced by a large number of embedded links forming a link farm. Several of these links point to known malicious redirectors, and the document itself was flagged by a machine learning model and ClamAV as malicious. The primary attack pattern involves directing users to external, potentially harmful websites through a deceptive link structure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/aws?utm_term=active+sky+2012+fsx In PDF document text
    • https://popekuzukije.weebly.com/uploads/1/3/4/4/134471955/a9c04bd3b1e60.pdfIn PDF document text
    • https://kikobuvikivevir.weebly.com/uploads/1/3/1/4/131437815/161924.pdfIn PDF document text
    • https://zonerizarom.weebly.com/uploads/1/3/4/3/134310007/pojexobozekunax_tugesa_feniduk_wavuso.pdfIn PDF document text
    • https://wawaxotev.weebly.com/uploads/1/3/4/3/134368025/69fc78afd685.pdfIn PDF document text
    • https://wujawosekeg.weebly.com/uploads/1/3/4/7/134712458/3077765.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449614/normal_5fb254a71b396.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413590/normal_5fdec817106c4.pdfIn PDF document text
    • https://cdn.sqhk.co/koxajavu/jcjbHjb/fasaridodosug.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/207353.pdfIn PDF document text
    • https://rofinodaki.weebly.com/uploads/1/3/4/7/134721453/c097cf3964974.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462694/normal_5fa465b23eec0.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/zabevog/maytag_washer_centennial_manual.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE19 5148 bytes
SHA-256: 8ce409ab93cbbea1065be566e225e329d681873c4e66cfc95ffa88af4afa13f9
font_01_sfnt_off0000efdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDD 10928 bytes
SHA-256: f07f913157a3ee2485ec5b25612cbc5d7cb5e2fda9288c216ffe88aa9b564174

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