Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ccfb122009c280b…

MALICIOUS

PDF

85.1 KB Created: 2021-04-14 06:40:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f62ef576c1ed0f0e60f90ba72510808 SHA-1: 545cbfbdd6e20387547d4a48030e70aa0f3b7243 SHA-256: 6ccfb122009c280b6a0ed31302bc8d69968369be9367850f366037531f3d18ff
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high-confidence heuristic identifying it as a link farm on disposable hosting, directing users to a phishing site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or credential harvesting. No scripts were extracted, but the PDF structure and embedded URIs suggest an attempt to redirect the user to a malicious domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://resalured.ru/strik?utm_term=english+101+college+writing
    • https://cdn-cms.f-static.net/uploads/4481528/normal_600f0196b4522.pdf
    • http://veruvipavopa.getenjoyment.net/10706601086.pdf
    • http://korsabarca.com/bupareladolulidokokizif0fwve.pdf
    • http://info-pages.ru/how_to_draw_anime_book_free_downloadbz2q9.pdf
    • https://static.s123-cdn-static.com/uploads/4393506/normal_5fc88f7c2650a.pdf
    • http://price-list.moscow/pegosopajsw3n7.pdf
    • http://axecheat6.xyz/venn_diagram_questions_exampleb96yr.pdf
    • http://nerroba.info/what_happens_in_book_6_of_harry_potterq9b1x.pdf
    • http://shopsupergood.site/24462149802kvusi.pdf
    • https://static.s123-cdn-static.com/uploads/4446170/normal_5fd086a114bc0.pdf
    • http://apparentlyopt.com/750736714262khln.pdf
    • http://twitter-center.com/gallicismes_exercicesm8oig.pdf
    • https://cdn-cms.f-static.net/uploads/4481422/normal_5fd89e972da5d.pdf
    • http://mini-camera-super.club/can_a_thin_blue_line_be_positived40mi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://kulebosux.myartsonline.com/arm_controller_basics.pdf
    • https://s3.amazonaws.com/fosagoba/43184150202.pdf
    • https://b8f7bc2e-5f90-466c-a76c-b8215bfdb3ae.filesusr.com/ugd/9717d9_562147ddd3254d35bf5a6c743b79b61c.pdf?index=true
    • https://22449060-8e30-4723-8828-967625cce342.filesusr.com/ugd/eddc50_299bef53f25e47ea8882c8edef6a3936.pdf?index=true
    • https://f0f855fd-29d2-4bf6-9fdd-af1de8d1f91d.filesusr.com/ugd/184831_fca148476cb84104aa92aafd5d5685aa.pdf?index=true
    • https://13adc596-845f-4f4a-b539-e2c04a0a4b5a.filesusr.com/ugd/6e2da7_c0862377a4464e3a9cccd57669c73c2e.pdf?index=true
    • https://4bd9ed84-c80b-4837-bb2f-b1353ebfd8aa.filesusr.com/ugd/5a1791_4609175858b14321b84c221b25c54d53.pdf?index=true
    • http://sifebitufol.onlinewebshop.net/43446759496.pdf
    • https://s3.amazonaws.com/dewazewokib/puxonepebadod.pdf
    • https://s3.amazonaws.com/meludav/detector_de_radar_cobra_spx_900.pdf
    • https://s3.amazonaws.com/vukujidor/duvuranekabe.pdf
    • http://nuvebabe.atwebpages.com/davovifovezidu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010287.bin
a8d66bf2effdb9741caba34315e8b1609afb717364639a1cea908a5446ba5c1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10287 4880 bytes
font_01_sfnt_off0001132a.bin
79343968687b973c627d9fee259a40fdda0b402fa084f9ff5169d9da6f13beac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1132A 10892 bytes
font_02_sfnt_off0001383a.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1383A 4324 bytes

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