Malicious PDF — malware analysis report

Static analysis result for SHA-256 7068e765b2cb0120…

MALICIOUS

PDF

74.2 KB Created: 2021-02-18 13:00:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6808d29c2ba6035b9ca74037dc1cf92b SHA-1: d86c776c4c4d29c4792ea6e899746a0485c3eb06 SHA-256: 7068e765b2cb01201ff06732dc6fa76f1634985367ed6a731e924da54b623425
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://jacksth.ru/wix?keyword=ece+25+ucsd+reddit PDF link annotation
    • https://cdn.sqhk.co/zasokolof/cVOpoXO/cute_puppy_licking_screen.pdfIn PDF document text
    • https://cdn.sqhk.co/miloxuso/hdhfkHN/judagigew.pdfIn PDF document text
    • https://cdn.sqhk.co/zuvutose/geihYii/zawikodu.pdfIn PDF document text
    • https://gixatupugibezi.weebly.com/uploads/1/3/5/2/135296842/d644895293a7f39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504922/normal_5fd636c0263f2.pdfIn PDF document text
    • https://gugeropufil.weebly.com/uploads/1/3/0/8/130874104/sujak_nonojekepijikir.pdfIn PDF document text
    • https://cdn.sqhk.co/jekuzedu/HgCgejc/26031929488.pdfIn PDF document text
    • https://fukopimuwevi.weebly.com/uploads/1/3/5/3/135351499/putibid.pdfIn PDF document text
    • https://cdn.sqhk.co/dofubetu/iftPczC/swords_and_sandals_2_redux_maximus_edition_cheats.pdfIn PDF document text
    • https://vinaribibivo.weebly.com/uploads/1/3/1/8/131871854/97f4e98.pdfIn PDF document text
    • https://tajamexuzoxobug.weebly.com/uploads/1/3/1/4/131410736/4510546.pdfIn PDF document text
    • https://cdn.sqhk.co/zotiperugi/NhgVieC/human_centipede_3_movie_online.pdfIn PDF document text
    • https://fumuradowije.weebly.com/uploads/1/3/0/7/130739974/a6fc03402d.pdfIn PDF document text
    • https://jareruko.weebly.com/uploads/1/3/4/3/134348829/bbb7eb44579419e.pdfIn PDF document text
    • https://murunabijijot.weebly.com/uploads/1/3/5/4/135401069/e1ed5d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366360/normal_5fdaafa049c37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453327/normal_5fe82afb9f818.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nenunosulijud.rf.gd/8058876960.pdfIn PDF document text
    • http://dabixuri.rf.gd/85756988747.pdfIn PDF document text
    • http://forevar.rf.gd/zugebisotuvonubub.pdfIn PDF document text
    • http://xitajorowemep.epizy.com/54968941557.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD780 4568 bytes
SHA-256: 0532500f716d727bb0206f8b3249f10d309dd09769cddbf2779219229ece9aaa
font_01_sfnt_off0000e720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE720 11904 bytes
SHA-256: d43d1a83888de667bb79cc7ac7c6e88606a8cd933b754bebdf748485cc884480
font_02_sfnt_off00010bef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BEF 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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