Malicious PDF — malware analysis report

Static analysis result for SHA-256 0794b1fad3efed9d…

MALICIOUS

PDF

87.9 KB Created: 2021-03-06 12:01:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 2538e17faef0df8e03a560804aebb19b SHA-1: a7cf170d65eda94f0c4a275eca7f26ae359169e7 SHA-256: 0794b1fad3efed9d46dda2ac10ab1809e4b8114b01fc6113e365dbe6cc9b90cf
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are flagged as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious sites, potentially exploiting PDF vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://golowaki.ru/123?utm_term=soundlogic+xt+rave+bluetooth+speaker+manual PDF link annotation
    • http://zurujavurobe.scienceontheweb.net/82479258143.pdfIn PDF document text
    • https://cdn.sqhk.co/futipujorup/tgggcjd/electronic_drum_set_price_in_sri_lanka.pdfIn PDF document text
    • http://mstmail.space/vexizoniniwoxizawaxoy33e4.pdfIn PDF document text
    • https://cdn.sqhk.co/xasakeza/hhjduje/3d_sound_effects_free_download_for_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488592/normal_600d3b9d674e3.pdfIn PDF document text
    • https://teparapilaw.weebly.com/uploads/1/3/4/4/134477765/2913163.pdfIn PDF document text
    • http://bravos-kids.ru/revubevotujizodibajukus5ch.pdfIn PDF document text
    • http://trylait.pro/three_billy_goats_gruff_puppet_templates2w55u.pdfIn PDF document text
    • http://cashbackk.site/cuentas_contables_de_costos_estandaryj7lo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417644/normal_5ffd54dd2ea53.pdfIn PDF document text
    • http://waferaboteb.mypressonline.com/how_to_clean_a_waring_waffle_maker.pdfIn PDF document text
    • http://glawerry.online/do_arbys_have_soupy7q75.pdfIn PDF document text
    • https://cdn.sqhk.co/wezopexa/gj2gggh/sport_apple_watch_bands_42mm.pdfIn PDF document text
    • https://mofumamivuzav.weebly.com/uploads/1/3/1/0/131070192/70fbe9f231.pdfIn PDF document text
    • http://whysmall.space/what_are_some_examples_of_fairy_talescete1.pdfIn PDF document text
    • http://megalit-korolev.ru/57755932871r9nc2.pdfIn PDF document text
    • http://hookup154.site/dalopiratinivomusongymtq.pdfIn PDF document text
    • http://armada.technology/55712958746bwalt.pdfIn PDF document text
    • http://pirunumilusarib.sportsontheweb.net/libro_la_meta_resumen_por_capitulos.pdfIn PDF document text
    • https://dixufewopirar.weebly.com/uploads/1/3/0/7/130775961/5e1a7d66.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://mepitar.atwebpages.com/9202095978.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_off00010afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFA 5804 bytes
SHA-256: dff7d0142c58151641374e50b85d8bd36596ae48da4f5da431046aac7232a2df
font_01_sfnt_off00011e7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E7D 10972 bytes
SHA-256: 9f51a6f639acf0a67280c025ec7c702fe6b84cd80e306b3473ec9b2a9398d2d6
font_02_sfnt_off000143d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143D0 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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