Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a9dab400bc4064a…

MALICIOUS

PDF

70.1 KB Created: 2021-03-19 03:20:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1e61054bf8bb9d080a67971bdc8c81f SHA-1: dd771dfdd7fc99e562bf8e5c2aa8f58711cd81f0 SHA-256: 5a9dab400bc4064a43c49710efc1605818439e965c4a327628b38f43e99795a8
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a site seemingly offering cloud manual firmware updates, a common lure for phishing or malware distribution. ClamAV and ML classifiers strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URI suggest it's designed to exploit users through social engineering, likely leading to a malicious download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mezovuduw.ru/wix?keyword=my+cloud+manual+firmware+update
    • http://linefofaxugedu.mywebcommunity.org/la_vida_es_sueo_cervantes_virtual.pdf
    • http://sitonuba.mypressonline.com/calculus_early_transcendentals_6th_edition_free.pdf
    • http://ravevuzovije.mywebcommunity.org/guide_pratique_pour_l_agriculture_biodynamique.pdf
    • http://bitiwiz.medianewsonline.com/sword_art_online_alicization_war_of_underworld_part_2_episode_1.pdf
    • https://cdn-cms.f-static.net/uploads/4452845/normal_60384e5f3c0bc.pdf
    • https://cdn-cms.f-static.net/uploads/4480899/normal_60197c7e0fb3c.pdf
    • http://moxegelubopidi.sportsontheweb.net/why_did_the_spanish_armada_failed.pdf
    • http://gejudoxe.mypressonline.com/blood_bowl_2_legendary_edition_star_players.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pewulalabes.epizy.com/komemizapuwifopotuje.pdf
    • https://c0a42e0f-4cce-4e1b-84a6-2a5440198d67.filesusr.com/ugd/440b6d_9d7fd8b042af462fa9e29bf611a2da2e.pdf?index=true
    • https://02bc4616-4eae-4b38-b2c9-0e654f754ee0.filesusr.com/ugd/069df5_b9d14f8ec7474062a02ce001617c7d8c.pdf?index=true
    • https://99b08629-27b2-41dd-83a1-938dc2ca35bd.filesusr.com/ugd/067ecb_9f9d92f7860b440fb7255d87c520abad.pdf?index=true
    • http://pulutugorivexek.atwebpages.com/vertebrate_palaeontology_benton_4th_edition.pdf
    • https://c0cead0d-5248-483d-940e-95cc3acd9bde.filesusr.com/ugd/20d83a_f8953505fc4d4888870f9306efb11a64.pdf?index=true
    • https://ced6af22-cf5f-4df0-9cd6-2d424634d287.filesusr.com/ugd/3eed2b_7a210a321f1044e6b24438728acfc0cf.pdf?index=true
    • http://midelex.epizy.com/guide_for_little_alchemy_2.pdf
    • https://0f8fedcd-12c0-4678-86f8-e2bff7269121.filesusr.com/ugd/70e7d4_f82b8b595adf420d9428e6ff342f716a.pdf?index=true
    • http://romakilax.myartsonline.com/10369336153.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_off0000d3c7.bin
c87487432d9bc2552c3e2b4d47b6282b83e4edba28ffaa9b975e8fcd6f79231d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C7 5324 bytes
font_01_sfnt_off0000e5ef.bin
d9b4a07c7330b5bddb328f77c10e4313714bf8630ae7c2b3d99c89e9fe6b1a6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EF 11052 bytes

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