Malicious PDF — malware analysis report

Static analysis result for SHA-256 6acace56fcff5c2e…

MALICIOUS

PDF

78.1 KB Created: 2021-02-19 22:13:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ea01a4890714ddb2af5509835efbfd69 SHA-1: 3dbd44ef9a1bb7530da78f013cb2c251ef6d645d SHA-256: 6acace56fcff5c2e60a54b6e3c6bfaf166a23e4cb19feb9b08ac6b87135ad0cc
244 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to disposable hosting or redirector services, indicating a link farm or phishing attempt. The presence of a critical heuristic firing for 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ClamAV detection further support its malicious nature. The document body, though heavily obfuscated, contains text related to Roku TVs, suggesting a potential lure.

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/123?utm_term=do+insignia+roku+tvs+have+bluetooth In PDF document text
    • https://ralixuviromod.weebly.com/uploads/1/3/5/3/135345966/79a6a2.pdfIn PDF document text
    • http://jopkapopka.online/zaxixatarotozejogilujelauriv8.pdfIn PDF document text
    • https://cdn.sqhk.co/wularumijif/lOhgcie/myrkur_ella_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/wifinalimow/Zhj1xKA/goalrilla_soccer_goal_assembly.pdfIn PDF document text
    • https://wuxelulomevadi.weebly.com/uploads/1/3/4/9/134904547/kenoxiwegejumurufaj.pdfIn PDF document text
    • http://summ-ita.space/what_is_the_functional_analysis_approachujfnb.pdfIn PDF document text
    • http://onlineeshop24.xyz/12v_plug_in_heater_for_side_by_sidevcux0.pdfIn PDF document text
    • https://cdn.sqhk.co/zotofoza/a4Kjc6a/free_sound_effects_for_youtube_videos.pdfIn PDF document text
    • http://shishkin-seed.xyz/dopefakofulimikowakurugupxxag1.pdfIn PDF document text
    • http://werewov.22web.org/zevamesarowezoba.pdfIn PDF document text
    • https://cdn.sqhk.co/dodanadofu/7qzkigf/devibuxusaligakudi.pdfIn PDF document text
    • http://baltika-trans.com/pijopogeowyar.pdfIn PDF document text
    • https://cdn.sqhk.co/kejofuvata/eUhgJTU/83694801903.pdfIn PDF document text
    • https://cdn.sqhk.co/palubavuz/KfibCia/13076514259.pdfIn PDF document text
    • https://poxatekegevu.weebly.com/uploads/1/3/4/7/134753674/0391ca83c651ee.pdfIn PDF document text
    • http://salonop.xyz/jizozzqfff.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://topufopotu.epizy.com/47154702889.pdfIn PDF document text
    • http://xovipofeguz.epizy.com/jagadofos.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_off0000e8ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BA 5092 bytes
SHA-256: a979979317425ace278bc666c5cc9abbfe93d7e51ae62ff98c20d9ee40ac99d3
font_01_sfnt_off0000fa11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA11 10296 bytes
SHA-256: 63befa6b1e7e7e60e7637c3c0826750ea12f4f166bd92e96f48e5696bec464a2
font_02_sfnt_off00011d53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D53 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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