Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d7e2ec844b22f43…

MALICIOUS

PDF

80.7 KB Created: 2021-04-07 18:56:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e5fe8c12ca86cf05bbe93f3cd58c5a5 SHA-1: 8d883930eacb6e62e02c9bff5f1ab2512cd90990 SHA-256: 0d7e2ec844b22f437c92dd684e4e50010dbc2c175988400b25b2ea7fb14c0aea
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs pointing to disposable domains and link farms, indicating a strong intent to redirect users to potentially harmful content. The presence of external URIs and embedded URLs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/wix?keyword=stimuli+response+and+behavior+worksheet+page+1
    • http://urologo.store/38112763001ykcic.pdf
    • https://cdn.sqhk.co/geruxibab/tjjhewq/24095949022.pdf
    • http://rasudilikid.mywebcommunity.org/why_do_natives_not_have_to_pay_tax.pdf
    • http://about-central.com/75313527200lulb7.pdf
    • https://xaweworamek.weebly.com/uploads/1/3/4/6/134610398/kebenunomopu_nasozuwedo_givowedofomoj_bufutegigowes.pdf
    • https://cdn.sqhk.co/xapewiwud/gSCqgsv/74086736678.pdf
    • https://danegatazi.weebly.com/uploads/1/3/0/7/130776269/9269622.pdf
    • http://tcerkovniekupola.space/30745855558200vk.pdf
    • https://cdn-cms.f-static.net/uploads/4455207/normal_600a786325a6e.pdf
    • https://cdn.sqhk.co/lajawawinu/hfgjjeL/weather_forecast_weather_radar_weather_live.pdf
    • https://manujemupofux.weebly.com/uploads/1/3/0/7/130738512/pimiwakugaji.pdf
    • https://cdn-cms.f-static.net/uploads/4470540/normal_6066447e303a9.pdf
    • https://cdn.sqhk.co/natefisaka/RCkheZG/32884967660.pdf
    • http://lasns.fun/zufavadunuvetamorg8ry.pdf
    • http://pozufopajosel.mypressonline.com/80019161219.pdf
    • http://retoxen.mypressonline.com/definicion_de_texto_descriptivo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xisefowu/32382228423.pdf
    • https://s3.amazonaws.com/waduzirader/12256301330.pdf
    • https://s3.amazonaws.com/ravuxudibure/78681376047.pdf
    • https://s3.amazonaws.com/gusule/surah_ar_rahman_dan_terjemahan.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_off0000fb8b.bin
1b09f6985069b4ba40f6f18ad01fba64dd9ac691df1dae315516391ef449141a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8B 5884 bytes
font_01_sfnt_off00010f77.bin
422ef980492af9e936cfee65aa79541bf98528b89f27aed4568d8f72553398be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F77 11364 bytes

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