Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf5e7e88df4e472d…

MALICIOUS

PDF

77.7 KB Created: 2021-04-30 12:33:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f4dfc0eecee5cf71309e77fa1b2e940a SHA-1: 9dd5531b5a38305969649c327d6eedaf00c39459 SHA-256: bf5e7e88df4e472d4c22356b55e782d83bbaed4fce20c8d63b93720a565e81ca
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://crophysi.ru/strik?utm_term=sistema+endocrino+esquematizado PDF link annotation
    • https://cdn.sqhk.co/devisofage/p7Vjeig/abc_7_new_york_schedule.pdfIn PDF document text
    • https://bakubirusi.weebly.com/uploads/1/3/4/6/134680497/jotibatoja.pdfIn PDF document text
    • https://cdn.sqhk.co/kafufojugure/OhbJxij/vobupiridotiwu.pdfIn PDF document text
    • http://frontglass.xyz/katalog_toto_2018quib2.pdfIn PDF document text
    • https://judorobizud.weebly.com/uploads/1/3/4/4/134455398/4312176.pdfIn PDF document text
    • http://magnetfix.store/the_devil_wears_prada_cast_miranda_priestly5qcfu.pdfIn PDF document text
    • https://cdn.sqhk.co/wemopizajazo/icVCW3F/formula_drift_2020_standings.pdfIn PDF document text
    • https://cdn.sqhk.co/zapakolozu/io03Phg/95089014673.pdfIn PDF document text
    • http://azorocheat1.xyz/epson_xp_6000_refillable_cartridges42ap8.pdfIn PDF document text
    • http://petrol-v-pol-price.site/1952415285k8sh2.pdfIn PDF document text
    • http://tojuvapemupo.mywebcommunity.org/basic_korean_for_dummies.pdfIn PDF document text
    • https://cdn.sqhk.co/xidatelo/gdaibid/66908860801.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://63b1f34b-4847-450f-8d9a-4788d10e1cf5.filesusr.com/ugd/451a43_1edb39b9e30f4e0aaeaf9af86d59e4dc.pdf?index=trueIn PDF document text
    • https://02687da8-bf2b-436b-a8ca-82c6e04513a5.filesusr.com/ugd/e48f8a_141fba54847a4db889e79bd53cafd746.pdf?index=trueIn PDF document text
    • http://wasofiwomorap.epizy.com/3865859216.pdfIn PDF document text
    • https://c30b87d5-e38e-4f4c-8f61-e356d9eaafe8.filesusr.com/ugd/347120_a11bdd4a9c1f494c91263716aacdb1b0.pdf?index=trueIn PDF document text
    • http://mujujum.epizy.com/convert_entire_website_to_online_free.pdfIn PDF document text
    • http://gudugapapilile.atwebpages.com/bransle_de_champagne.pdfIn PDF document text
    • http://jopanitovoxa.epizy.com/pesafunogobetiko.pdfIn PDF document text
    • https://0fecb50d-c8db-4b5c-a67e-01a13b1c0e9a.filesusr.com/ugd/da7c2d_bccaa9d9bbd0485ebccd49929ec0abaa.pdf?index=trueIn PDF document text
    • http://zepapalirexi.rf.gd/50585575041.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF165 5332 bytes
SHA-256: 725cd47957c469bbab83410f3bc36cfdf82df3d1f9e1abe68d5c0cee5c67dc81
font_01_sfnt_off0001036a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1036A 11216 bytes
SHA-256: c5eaae3aa874572dbc0a9682419cc0c5fce630bfc5fd90016cb9ac61770c1f0e

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