Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2d01a51665ba63e…

MALICIOUS

PDF

77.4 KB Created: 2021-03-13 16:05:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7bf36b781fa2bd73ab677e5847cdcb68 SHA-1: 2ca16252277d416cd0ff8a976bf18d744ceb1003 SHA-256: b2d01a51665ba63ee66cca1c19661b0a66ab589ddc344c9e30f47bf979b0e465
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://crophysi.ru/wix?keyword=free+gift+card+codes+generator PDF link annotation
    • http://jasazotinalol.mygamesonline.org/tango_albeniz_piano.pdfIn PDF document text
    • https://faxezufag.weebly.com/uploads/1/3/0/8/130874059/8921382.pdfIn PDF document text
    • http://rolivazugatar.scienceontheweb.net/24240965151.pdfIn PDF document text
    • https://tesegape.weebly.com/uploads/1/3/5/3/135387632/ca44d6bcb179b.pdfIn PDF document text
    • http://suzamajotibe.mywebcommunity.org/polygons_worksheet_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379616/normal_5febfd714ba93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369327/normal_602b23e341f27.pdfIn PDF document text
    • http://lokubakodo.getenjoyment.net/xadifuxovowekomajuk.pdfIn PDF document text
    • http://luxasireku.sportsontheweb.net/singing_for_the_stars_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476010/normal_60174adf019c3.pdfIn PDF document text
    • https://fisadurubimu.weebly.com/uploads/1/3/1/4/131409264/soneko_wevuganutebabut_jazemovilut_luludaxupaso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405929/normal_60214ee3a6db1.pdfIn PDF document text
    • http://puvinizozibejir.mygamesonline.org/fidunutafejagedozik.pdfIn PDF document text
    • https://sovufejado.weebly.com/uploads/1/3/0/7/130740048/d046bfd77b7c87.pdfIn PDF document text
    • https://cdn.sqhk.co/sesexibanobu/jfhhggC/35561186082.pdfIn PDF document text
    • https://cdn.sqhk.co/rivotoxupow/hdhbzif/the_diplomat_magazine_wiki.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/cdd52346-94bf-4ad4-a3de-52ea29adfe17/jisanibu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb49f95b-ab47-47e3-ac36-2ea219bfefd1/95516224376.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4747f9c-e0ca-4093-91c4-5434a067ee51/en_la_mitologia_griega_los_dioses_del_inframundo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dde62fa-58ac-4523-aa2d-80f8d5a95fa4/44827949867.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71f2d3dd-4652-40e6-9aa0-2387284b10a9/11_birthdays_summary_shmoop.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_off0000e404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE404 4900 bytes
SHA-256: dbf286818282d06a84edf30c2c7b3c6b0cd9ac6736f0f499349ac342471c709d
font_01_sfnt_off0000f4b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B5 11036 bytes
SHA-256: e0864a4e86d9554c99163c711be978af429f28a20bb01d3be07f4c3279c693e9
font_02_sfnt_off00011a44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A44 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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