Malicious PDF — malware analysis report

Static analysis result for SHA-256 60f454d68d6b69ac…

MALICIOUS

PDF

71.9 KB Created: 2021-02-20 07:32:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: e4709a8d164b6b87621c44926b460d61 SHA-1: b2934abe24d2d98b70a1e4abb32912456d677b41 SHA-256: 60f454d68d6b69ac22346db004aac4f1a81df8f14fc13c1394b8395e9e6e10e9
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to disposable hosting services and appear to be part of a link farm. One critical heuristic indicates a link to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or redirecting users to malicious content.

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://crophysi.ru/strik?utm_term=how+to+save+render+video+in+blender In PDF document text
    • https://cdn-cms.f-static.net/uploads/4470387/normal_5fdc06a2685c2.pdfIn PDF document text
    • https://musevupuli.weebly.com/uploads/1/3/1/4/131438528/7910216.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472788/normal_602d59da321be.pdfIn PDF document text
    • https://zuzedunili.weebly.com/uploads/1/3/4/4/134460484/topuwadimi-xilanudikof.pdfIn PDF document text
    • https://cdn.sqhk.co/jesupesiparu/jcgfMha/calendar_2021_june_july.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484355/normal_6020927f13854.pdfIn PDF document text
    • https://samabuwe.weebly.com/uploads/1/3/0/7/130739499/6534296.pdfIn PDF document text
    • https://zafasasuk.weebly.com/uploads/1/3/4/7/134713251/puwaliverumido.pdfIn PDF document text
    • https://pevusipifo.weebly.com/uploads/1/3/4/8/134863194/xisufetar-nawepafipu-jixolonexad-xuwixomo.pdfIn PDF document text
    • https://xekigumi.weebly.com/uploads/1/3/0/7/130776031/kezosalemola-tanukaguduzuf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490366/normal_5fccf431455b7.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/lumixi/what_is_the_judiciary_system_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/11043436127.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_off0000dd5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5C 5072 bytes
SHA-256: 3b5a43342ae8e6c60459b1db3c62b5bf962b62884ba4724dbe98af621ecb6d50
font_01_sfnt_off0000eeb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB9 10604 bytes
SHA-256: 3c3609f718fccbd0dc2c8e8b96049c110cd699fa39bfe407c6a655182f165549

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