Malicious PDF — malware analysis report

Static analysis result for SHA-256 7534d53cdd4f2daf…

MALICIOUS

PDF

78.3 KB Created: 2021-06-09 12:24:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4fe87c092b468a17e3106dc1fd66f38 SHA-1: 0fada9331c8af6286666bea090a908705b9513f6 SHA-256: 7534d53cdd4f2daf9b96b55e38da1f1be5355679ef4ade151d93af266592f6ca
126 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many of which point to disposable hosting services and appear to be part of a link farm designed to redirect users. The presence of external URIs and the ML classification strongly suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://queure.ru/pbw?utm_term=private+limited+company+in+ethiopia+pdf+amharic
    • https://malufatagu.weebly.com/uploads/1/3/0/8/130874424/falagudoxawelun.pdf
    • https://jisuxewaxem.weebly.com/uploads/1/3/1/8/131857679/6a946de.pdf
    • https://cdn-cms.f-static.net/uploads/4420235/normal_604aedb0c4ac4.pdf
    • https://mivewuwadomabat.weebly.com/uploads/1/3/1/6/131606259/8ae60e5d7.pdf
    • https://namodezax.weebly.com/uploads/1/3/6/0/136055978/febiw-patite-xijoz-dewedogawize.pdf
    • https://cdn-cms.f-static.net/uploads/4367646/normal_601de139444d0.pdf
    • https://sofusosixep.weebly.com/uploads/1/3/4/4/134493363/gigokep.pdf
    • https://gininigexaviw.weebly.com/uploads/1/3/5/3/135350692/fokawexamadobizinin.pdf
    • https://static.s123-cdn-static.com/uploads/4490524/normal_5fde42a864c63.pdf
    • https://static.s123-cdn-static.com/uploads/4392873/normal_5fed154483cd2.pdf
    • https://sofovelo.weebly.com/uploads/1/3/1/3/131379060/4183577.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xobapotowi.pbworks.com/f/what_are_peptide_and_steroid_hormones.pdf
    • http://ditidema.pbworks.com/f/ficha_de_anamnese_depilao_grtis.pdf
    • http://pukagij.pbworks.com/w/file/fetch/144464838/fire_hd_8_tablet_case_with_keyboard.pdf
    • http://jotuwufo.pbworks.com/w/file/fetch/144708474/manedusukojuxebo.pdf
    • http://supijexed.pbworks.com/f/1331490062.pdf
    • http://ruxafonan.pbworks.com/w/file/fetch/144795810/62141310702.pdf
    • http://goferupemo.pbworks.com/f/buvukejija.pdf
    • http://ziduzobif.pbworks.com/w/file/fetch/144680838/what_does_take_two_tablets_by_mouth_daily_mean.pdf
    • http://denipugo.pbworks.com/w/file/fetch/144617589/32813809274.pdf
    • http://xuresasadox.pbworks.com/f/72485387106.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1e3.bin
50867f71cf584657bed1be1b0172706195261702834491e99871404fcbaf6245		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E3 5380 bytes
font_01_sfnt_off00010417.bin
812c7ab580cf7af5c383c8da21a6a42c5bdbccd78c76282f6748bbaaae5fd0c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10417 12308 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.