Malicious PDF — malware analysis report

Static analysis result for SHA-256 492dbaad52f86541…

MALICIOUS

PDF

73.2 KB Created: 2021-02-27 01:01:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 8ae7ba30e6b544cdb506b8487136389e SHA-1: bbb01669702745ef0f834267d1889fc26fae4646 SHA-256: 492dbaad52f86541dd7496f9a2ce23e44610c41b07a71e189d224ea556d3ceae
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external links, with several pointing to disposable hosting services, suggesting an attempt to distribute phishing content or malware. While no scripts were directly extracted, the PDF structure and extensive link farm heuristic indicate a malicious intent to redirect users to potentially harmful sites.

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
  • 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://vilenefex.ru/aws?utm_term=canon+mx700+printer+price PDF link annotation
    • https://daguvosiliwu.weebly.com/uploads/1/3/1/4/131406153/voxim.pdfIn PDF document text
    • https://xaweregosakub.weebly.com/uploads/1/3/1/4/131407668/5338600.pdfIn PDF document text
    • https://cdn.sqhk.co/tefaxobaf/jeasnhe/34489416235.pdfIn PDF document text
    • https://cdn.sqhk.co/tigixexaxi/W5FdvBM/fifa_world_cup_qatar_2022_groups.pdfIn PDF document text
    • https://cdn.sqhk.co/derixosu/gfBZ0jg/commander_cody_clone_wars_action_figure.pdfIn PDF document text
    • https://cdn.sqhk.co/junukexad/hcAhbIm/utg_offset_flashlight_mount.pdfIn PDF document text
    • https://zabaparadasikid.weebly.com/uploads/1/3/4/3/134317604/6839618.pdfIn PDF document text
    • https://pubabugolutaj.weebly.com/uploads/1/3/2/6/132680974/528167.pdfIn PDF document text
    • https://cdn.sqhk.co/gidulikegel/dfYyzia/difference_between_lean_startup_and_business_model_canvas.pdfIn PDF document text
    • https://pozuxona.weebly.com/uploads/1/3/1/3/131398461/6743802.pdfIn PDF document text
    • https://cdn.sqhk.co/remimidotomi/cihljcT/video_call_strangers.pdfIn PDF document text
    • https://vuxulirupam.weebly.com/uploads/1/3/5/3/135346280/bafixuxizemomuv_lujij_ruxikufazo.pdfIn PDF document text
    • https://zatibuvox.weebly.com/uploads/1/3/0/7/130738619/c0df96.pdfIn PDF document text
    • https://cdn.sqhk.co/fujalapevame/qjdgiEb/western_at_all_costs_netflix.pdfIn PDF document text
    • https://cdn.sqhk.co/sevafeluba/g48qUhc/sidekick_hero_name.pdfIn PDF document text
    • https://cdn.sqhk.co/milasutepi/awpduQl/the_new_york_times_magazine_chicago_bulls_cover.pdfIn PDF document text
    • https://cdn.sqhk.co/sixerusesebu/ZwjgjfL/bow_weapons_in_skyrim_early.pdfIn PDF document text
    • https://cdn.sqhk.co/xoraxuvonaf/jakjek5/black_clover_golf_hats.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/paropabaru/42423637339.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/nozubunewifexupudazinavi.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_off0000e1dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DC 5064 bytes
SHA-256: fe690992dc7b3c4266ac6991a793fd0df42abaeaa1d2e6ca9ccee08cf920dc32
font_01_sfnt_off0000f306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF306 10764 bytes
SHA-256: 4561af24c7ac40393ace70edd690091bd0f26e92146077c1cbf272214bf8e518