Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cc6a0f01adbb56e…

MALICIOUS

PDF

75.8 KB Created: 2021-01-13 02:54:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 3616b3f6f5d85d1d45fd8feba0e32f4b SHA-1: c65b035fadb1813ce8a267e2583fae6eb980a986 SHA-256: 5cc6a0f01adbb56ea5424da747e4bf1e8cd70251872dbd0a3655e5b65109e188
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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.
  • 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://trafffe.ru/123?utm_term=veil+of+maya+buddhism PDF link annotation
    • https://cdn.sqhk.co/jezuleku/jdtwtWM/fenozevu.pdfIn PDF document text
    • https://xojajadajopun.weebly.com/uploads/1/3/4/6/134646320/nujizowulik.pdfIn PDF document text
    • https://seritixatot.weebly.com/uploads/1/3/1/0/131070849/4197839.pdfIn PDF document text
    • https://fifimijo.weebly.com/uploads/1/3/4/7/134748793/b0a0fdf87.pdfIn PDF document text
    • https://wevupifusa.weebly.com/uploads/1/3/4/3/134356286/3822842.pdfIn PDF document text
    • https://sojenumodab.weebly.com/uploads/1/3/5/2/135296615/kiwiwe-refunajemerev.pdfIn PDF document text
    • https://fizubuvi.weebly.com/uploads/1/3/5/3/135301632/lizoluzin_tarukosoramipiw_loziwagifag_zojarujon.pdfIn PDF document text
    • https://cdn.sqhk.co/rifokinimito/XUYhjiU/medieval_madness_pinball_machine.pdfIn PDF document text
    • https://wotigutaz.weebly.com/uploads/1/3/4/3/134361511/tivatovinibafav-zojikema-detolexato-pusoreni.pdfIn PDF document text
    • https://kowadesilokawu.weebly.com/uploads/1/3/4/2/134265693/pigipirafuvel-zolugalowoneb-fomekoguk-jebawonilijawel.pdfIn PDF document text
    • https://nikuwexipamojag.weebly.com/uploads/1/3/0/8/130813731/tizujadogag_gisewela_senamive.pdfIn PDF document text
    • https://tototatinup.weebly.com/uploads/1/3/4/3/134332383/bososufatanipa.pdfIn PDF document text
    • https://wimiberurazem.weebly.com/uploads/1/3/4/3/134351881/5530528.pdfIn PDF document text
    • https://tumebadov.weebly.com/uploads/1/3/4/8/134863232/nopekotexe.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/bejokazemur/nedisuwaz.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/guided_meditation_script_loving_kindness.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_off0000ec14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC14 5256 bytes
SHA-256: b6833fd65565898b744ba8871cad2e06d8a6f1c87e85281731d7762f7b501e45
font_01_sfnt_off0000fdd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD7 10196 bytes
SHA-256: d118761d87408c5e4c8084ed503e84f3eb7c14dbbd90ad50889ad81b2efc4749

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