Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e225a78f511205d…

MALICIOUS

PDF

90.8 KB Created: 2021-04-23 03:11:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: e9ff03d8f9145c59ea7eb117b2755731 SHA-1: 94d410b863b9231e484869b3fc0022534ff7b2df SHA-256: 3e225a78f511205d58872f8f634e53458f527f105034466a2f427708dd10366d
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 services, indicating a link farm designed for SEO manipulation or phishing. One critical heuristic identified a link to known malicious redirector infrastructure. The ClamAV detection and ML classifier further confirm its malicious nature, likely serving as a lure to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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/strik?utm_term=a+world+of+art+the+metropolitan+museum+of+art In PDF document text
    • https://rarejitidod.weebly.com/uploads/1/3/5/9/135993923/074914f4d24aca.pdfIn PDF document text
    • https://cdn.sqhk.co/gegatuzikat/dgchjjd/best_funny_music_videos_of_all_time.pdfIn PDF document text
    • https://nevajuto.weebly.com/uploads/1/3/2/6/132695651/kumufezajogawej-vizuj-nawak.pdfIn PDF document text
    • https://jatokogeredere.weebly.com/uploads/1/3/3/9/133997843/sulazunud.pdfIn PDF document text
    • https://dobetabuzaduguz.weebly.com/uploads/1/3/5/3/135312815/8473426.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427104/normal_5feff361bb47b.pdfIn PDF document text
    • https://cdn.sqhk.co/xedasuzefer/icaghmV/26570225080.pdfIn PDF document text
    • https://vetedikagumon.weebly.com/uploads/1/3/1/4/131453784/5667584.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420235/normal_604a736e79f36.pdfIn PDF document text
    • https://jufufowepum.weebly.com/uploads/1/3/5/3/135348100/pafinesutid_jojozijazi_pugepup.pdfIn PDF document text
    • http://hangzhoumetal.ru/pobumurarilabisulubukikuxmifk.pdfIn PDF document text
    • http://idealica-italiaofficial.site/93807504026ww05r.pdfIn PDF document text
    • https://temegefa.weebly.com/uploads/1/3/4/5/134583031/guxijunomubi-xazinepupufo-dalelarod-revuxip.pdfIn PDF document text
    • https://cdn.sqhk.co/bojojiweg/dGO9jdg/83495269730.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446165/normal_602cdf278c0ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367000/normal_606da52edff61.pdfIn PDF document text
    • https://garasomebopite.weebly.com/uploads/1/3/0/7/130775476/saliwojimeme-zurefeludeketeg.pdfIn PDF document text
    • https://buritozube.weebly.com/uploads/1/3/0/7/130775753/jusagitovi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389376/normal_5ff784011e43f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414176/normal_6052d65378589.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464525/normal_60602f502c3a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416332/normal_606b5ea90023c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411709/normal_6062d3c398604.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://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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000feba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBA 5244 bytes
SHA-256: 4af4155cb6ca1c92a0ebd0ec8f2323341e0dd04b76f747393f92eff8100360f1
font_01_sfnt_off00011074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11074 11836 bytes
SHA-256: d6d840e1b57ca0dce71494e00abc8041b6992b316d483bafa18962f27496d048
font_02_sfnt_off00013871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13871 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7
font_03_sfnt_off00014d09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D09 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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