Malicious PDF — malware analysis report

Static analysis result for SHA-256 546d69112df29d2b…

MALICIOUS

PDF

69.6 KB Created: 2021-03-21 01:19:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0fb83e92607a349e5596c30dc57b5d0 SHA-1: 7a98b74dfd3c087c2daa3316bf7bc550f50cfc58 SHA-256: 546d69112df29d2b827545fc84be64d1fd247a4a84acc1e087f89341b095c281
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, suggesting a link farm or redirection mechanism. The embedded URLs point to various PDF files, indicating a potential distribution point for further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • 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://botokaw.ru/123?utm_term=car+background+for+editing
    • https://cdn.sqhk.co/tenalewi/fii7jdt/cartoon_wars_gameplay.pdf
    • https://cdn.sqhk.co/melobokodijo/9jamc3z/internet_of_things_definition.pdf
    • https://cdn.sqhk.co/mimotulifoti/jgnhbif/the_amazing_spider_man_cracked_apk.pdf
    • http://lirinevewafa.mypressonline.com/83921536524.pdf
    • https://cdn.sqhk.co/bidogefapo/gj4PLci/12975023908.pdf
    • https://zamizugupaf.weebly.com/uploads/1/3/3/9/133999186/rigatareriradibu.pdf
    • https://cdn-cms.f-static.net/uploads/4385030/normal_600eaf2d2d346.pdf
    • https://xaroduzorosu.weebly.com/uploads/1/3/1/3/131398324/setadi.pdf
    • https://static.s123-cdn-static.com/uploads/4369779/normal_5fe4b7b8b2799.pdf
    • https://static.s123-cdn-static.com/uploads/4416789/normal_5ffeb3a90bbd7.pdf
    • https://cdn.sqhk.co/rovujesox/cgdjdgc/kabiv.pdf
    • https://zafojulokigod.weebly.com/uploads/1/3/4/7/134741370/4696599.pdf
    • https://pekatube.weebly.com/uploads/1/3/5/3/135393066/8294462.pdf
    • https://cdn-cms.f-static.net/uploads/4486201/normal_602acb3d32147.pdf
    • https://cdn.sqhk.co/migukosodaza/faNJVxi/neuron_diagram_synapse.pdf
    • https://rigupanikoma.weebly.com/uploads/1/3/5/2/135297472/wudikoxiwumofakapel.pdf
    • http://vuvulusigi.scienceontheweb.net/anlisis_del_libro_tica_para_amador_de_fernando_savater.pdf
    • http://sewukagazub.mypressonline.com/is_google_maps_free_for_iphone.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d25e5d79-f3dc-43ab-8538-58f2f4730235.filesusr.com/ugd/898300_53f7ccf432de4259ab37f0aaa2106f8e.pdf?index=true
    • https://ca3ec1ac-6ff7-4c8f-ae0f-86a30d86e335.filesusr.com/ugd/3615fb_e186a1c0969642f3a374706844b930ea.pdf?index=true
    • http://xafibejijopo.atwebpages.com/87428436645.pdf
    • https://88966db1-4a83-4446-b941-f65022a6235f.filesusr.com/ugd/928e0f_9e9315e5c4fe426289edead9a212eae6.pdf?index=true
    • http://jozilaro.atwebpages.com/vilulogax.pdf
    • https://1a413096-4115-453c-84a6-e19f3d0a1e7a.filesusr.com/ugd/4a2d03_3bce1c41631441dda733b54d9d6c97f1.pdf?index=true
    • 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_off0000d5ef.bin
99cb3e68122e85520cccaad3868b3656703d0019154978e10fb000cc73564b0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5EF 5088 bytes
font_01_sfnt_off0000e74e.bin
b3fbdd8c45255fa299be6b44ea70b98f84daf96c242fdf3bdcc3f5d7ec049c58		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE74E 10096 bytes

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