Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f99b06bb1e150fd…

MALICIOUS

PDF

90.8 KB Created: 2021-06-02 13:51:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: a2d27dea08c5de0c795c43be04e0c583 SHA-1: 612ba6b13357a85f42f6c425197785effb91d4a5 SHA-256: 2f99b06bb1e150fdccd1901828ec026afb0a7d9ff11ba135c38b3c872a09de99
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a social engineering attack to drive users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://pistant.ru/pbw?utm_term=bazaart+free+alternative+android PDF link annotation
    • https://xokejajolaliz.weebly.com/uploads/1/3/4/7/134718337/pifug.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369512/normal_5fe00b7938254.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4370304/normal_60b1d0369cdb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417025/normal_5fd0ba2b2d2e0.pdfIn PDF document text
    • https://suluxeposinugu.weebly.com/uploads/1/3/4/6/134634013/91ba1d305d892.pdfIn PDF document text
    • https://paxesejok.weebly.com/uploads/1/3/4/3/134348383/9323151.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4461786/normal_60afffc930947.pdfIn PDF document text
    • https://vunatoja.weebly.com/uploads/1/3/0/7/130738644/bc23376.pdfIn PDF document text
    • https://daxedinojadu.weebly.com/uploads/1/3/4/5/134590150/6c753.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480728/normal_602879edcbabc.pdfIn PDF document text
    • https://fuxugikitoze.weebly.com/uploads/1/3/1/0/131070560/balizipitijek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454995/normal_5fd1f31c1d5c9.pdfIn PDF document text
    • https://bimomudunaxa.weebly.com/uploads/1/3/4/7/134757379/e214c0b670a.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/feb1fbb1-8eeb-462f-abfb-5d6a82d63f39/what_does_usps_priority_insurance_cover.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/819f2698-7b97-4033-9c5d-0801148be5b3/39652660826.pdfIn PDF document text
    • http://wamotarirup.pbworks.com/f/gloud_games_pro_hack_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b007e7d-6f3b-4355-98ad-087d95b4c06d/what_temperature_should_you_cook_chicken_on_a_george_foreman_grill.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e495de3-8955-4287-8cfa-d4b083a04145/romeo_and_juliet_act_2_scene_1_and_2_questions_and_answers.pdfIn PDF document text
    • http://xesimisejek.pbworks.com/f/3733003700.pdfIn PDF document text
    • http://sujagajo.pbworks.com/f/tojafepuzaninibeteveromas.pdfIn PDF document text
    • http://pigedigasexu.pbworks.com/f/dil_hai_tumhara_picture_ke_gane_video_mein.pdfIn PDF document text
    • http://kevuxezedila.pbworks.com/f/air_force_cadet_uniform_regulations.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB6 4668 bytes
SHA-256: d63ecdc1067cca1363282f75c3d476ad00a6a8525dd17fe5b49c72054b5508b8
font_01_sfnt_off0000ffa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA2 3428 bytes
SHA-256: 0bb7265210f5076d53b70959b3679a2544134e04da18d04f9e474626c5689b49
font_02_sfnt_off00010d80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D80 12172 bytes
SHA-256: 5d0058dc44b566234904b0c4d60d9127bc16cfbf9b4df4a6b76f2ffb33062196
font_03_sfnt_off00013767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13767 16860 bytes
SHA-256: 42de2b517de8d276a1796fe577e34c8c63fad0e5f28de3dd29797ca00ad3853b
font_04_sfnt_off00014ee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EE6 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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