Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff3dc2a780977901…

MALICIOUS

PDF

66.2 KB Created: 2021-02-17 17:49:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: cbe5510ba5e5f35a44643f5cbfeadc2a SHA-1: 950250644e6bf763666ab6c85b6f4b39d28d7b53 SHA-256: ff3dc2a78097790162b3ba0b82ef44489f42d9d5cf8bee30b31d87df10872d58
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://yafferge.ru/wix?keyword=automotive+workshop+manuals+online In PDF document text
    • https://somubafe.weebly.com/uploads/1/3/4/4/134444697/626359.pdfIn PDF document text
    • https://zedasadexim.weebly.com/uploads/1/3/0/7/130775923/tewufuze.pdfIn PDF document text
    • https://mazaxijav.weebly.com/uploads/1/3/4/4/134488449/pigiwa.pdfIn PDF document text
    • http://55571.ru/arena_football_league_teams_2020jk7yx.pdfIn PDF document text
    • https://bigevavez.weebly.com/uploads/1/3/4/0/134016854/kidad.pdfIn PDF document text
    • http://copyright-rules-help.com/jesixologimezisubewarunzongt.pdfIn PDF document text
    • https://zuzotupewumu.weebly.com/uploads/1/3/4/6/134691050/7805b10dec5846.pdfIn PDF document text
    • http://edayafar.xyz/xomepijalo4jdpy.pdfIn PDF document text
    • https://cdn.sqhk.co/rogekanus/CPgcDRi/28237607197.pdfIn PDF document text
    • http://amaryllis.space/436071109769i1pm.pdfIn PDF document text
    • https://fifeguku.weebly.com/uploads/1/3/4/7/134733895/dovofiposidiwetawomu.pdfIn PDF document text
    • http://meetlait.pro/nudadozafadegunotubixovuniqsp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://risitikavaj.rf.gd/69103734727.pdfIn PDF document text
    • http://ganusigesu.rf.gd/bogalesedimigesisajabaxuj.pdfIn PDF document text
    • http://werolalijatet.rf.gd/simple_admin_template_bootstrap_4.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC684 5264 bytes
SHA-256: dae29f10ff65c87d49d597f52c18189dc4f6a50041ca7b152adf69c15110078f
font_01_sfnt_off0000d851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD851 10388 bytes
SHA-256: 0f7f43cefe6c4ac89c35a6e46789b92fb2f004987aef548d24974f114381026e