Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeebb694944d94e5…

MALICIOUS

PDF

180.9 KB Created: 2021-03-13 17:05:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: bd1b30621961b5e937a3b6fad8e7aa0e SHA-1: 53f8c62d0eb1cbdf1fb0fb7c4baefb79dba2a593 SHA-256: aeebb694944d94e54dff1b56a52350bfe158eb9623ff49475556d19a1cd4eeb7
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 numerous external URIs, with one pointing to `https://ponafet.ru/wix?keyword=westminster+elementary+school`, suggesting a lure to a potentially malicious website. The PDF structure and embedded links indicate it functions as a link farm, likely intended to redirect users to phishing or malware hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://ponafet.ru/wix?keyword=westminster+elementary+school PDF link annotation
    • https://cdn.sqhk.co/fekesolip/giicYye/40084539229.pdfIn PDF document text
    • https://vaxejoxumede.weebly.com/uploads/1/3/5/3/135346770/bdfa514541d.pdfIn PDF document text
    • https://purotuduveb.weebly.com/uploads/1/3/0/7/130738796/439436.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481836/normal_60176240487fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479674/normal_60110cb2cbf3d.pdfIn PDF document text
    • https://cdn.sqhk.co/jivazufevi/jiciigd/dx_player_pro_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486041/normal_5ff2288e2627c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370985/normal_5ffe03319c44a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481831/normal_6031639cf16f7.pdfIn PDF document text
    • https://cdn.sqhk.co/tolononof/hisYhhi/business_game_board_rules.pdfIn PDF document text
    • https://cdn.sqhk.co/tefozakozup/9ifhgjf/slingshot_shoot_arrows.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403141/normal_6033af7146759.pdfIn PDF document text
    • https://lopiranurepo.weebly.com/uploads/1/3/4/7/134735856/623005.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
    • https://uploads.strikinglycdn.com/files/884e526c-0572-41d3-ae7e-ea00d6eea9b0/who_are_the_best_suspense_authors.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/kelazurinerilen.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/fofomuzetu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89e75941-2dda-4b91-b55d-eaefe0545e7b/bunabenenopebito.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/22024662736.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87234618-5e9e-4b3d-982c-6c18f6128736/dasewewomopiwipafojibi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ee8144d-fd1b-4d39-a4af-7d55bd4cc23f/tobovimegokusuwopazovavow.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_off000280c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x280C3 4944 bytes
SHA-256: ed8f84c0fa4ed4e54c41586eedab3bedfd2f25e132b239d6dafa70f1d07593b7
font_01_sfnt_off0002915e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2915E 11116 bytes
SHA-256: 6206cbe09b518f5c58418b3c27a80506ac5a9a7d7864e67b7342491468e12a31
font_02_sfnt_off0002b6a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B6A1 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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