Malicious PDF — malware analysis report

Static analysis result for SHA-256 6471c995e5fef020…

MALICIOUS

PDF

87.8 KB Created: 2021-03-24 13:42:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: fc4ffe63ee37ea948287a0d4abf0fd66 SHA-1: 5cf5a3d3a2a94441d4220dab5710dfc54796e8c7 SHA-256: 6471c995e5fef020557018ee2024790b4821d9d30a3626f79670ce20c0261c70
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs point to potentially malicious sites, and the document body, though garbled, includes a URL that appears to be a lure.

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://maypoin.ru/wix?keyword=grim+dawn+purifier+build+1.1.7 PDF link annotation
    • http://christinaanddavid2019.com/wapabitm1q3c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455898/normal_5fddd5c64b872.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366665/normal_602de84112434.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405193/normal_5ffb36a410edd.pdfIn PDF document text
    • https://sajulivos.weebly.com/uploads/1/3/1/1/131164476/warifuzezuzo.pdfIn PDF document text
    • http://oneitshop.pro/69383718899bphf1.pdfIn PDF document text
    • http://trastenmyqort.online/92043510094k7bfb.pdfIn PDF document text
    • https://rupuleda.weebly.com/uploads/1/3/6/0/136002844/moduvifevimu_pamex_dokuxu_mobepogobibu.pdfIn PDF document text
    • https://tabogivazosepa.weebly.com/uploads/1/3/1/8/131871767/ee401a.pdfIn PDF document text
    • http://faceskinagainbeauty.xyz/fl_studio_all_plugins_bundle_price_in_indiafs5xg.pdfIn PDF document text
    • https://lefesime.weebly.com/uploads/1/3/4/8/134882546/mazixalimata.pdfIn PDF document text
    • http://silkhfig.bid/2012_jeep_grand_cherokee_service_manualpdxsa.pdfIn PDF document text
    • https://gejodawutu.weebly.com/uploads/1/3/1/1/131164152/1401140.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404753/normal_5fd77aa7c7653.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d737217-48e8-4a93-8077-2e019db9b69e/how_to_use_speedlite_430ex_ii.pdfIn PDF document text
    • http://judowasejalux.rf.gd/logo_agriculture_biologique.pdfIn PDF document text
    • http://mujelagikajuju.rf.gd/48691656647.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23702fd7-43eb-4bc1-b5a0-414285392bb8/burger_king_breakfast_menu_hours.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9e1ef78-cca9-4a9d-aa83-496f21e7ec86/dragon_age_origins_denerim_quest.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e0c9406-1c21-4af1-be51-a53ca6a26aa0/lexile_conversion_chart_fountas_and_pinnell.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c46f9b0-a5e1-4f9f-81ea-8d916ede7bb9/29140409465.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_off0001173f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1173F 5436 bytes
SHA-256: ca20d745f5224a85bc79b6d7494d2d84a871de191eeb18d71855bae8ed837692
font_01_sfnt_off000129c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129C3 11724 bytes
SHA-256: 1f38aeae9a65a33324a9aac38333b5529e947b04ee0ae6a44cc1d4b4facda97c

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