Malicious PDF — malware analysis report

Static analysis result for SHA-256 76d6a79542cafd48…

MALICIOUS

PDF

71.7 KB Created: 2021-03-26 12:20:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a31c30b854192dc651c1212b0672ad76 SHA-1: eb7f72abd4cb03b2e152484800c4acbfd15d29ca SHA-256: 76d6a79542cafd487034019a2f7f73e12a1052e3c36ad79cc39e1cc4faae76b0
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 0.9991

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://pelibifir.ru/123?utm_term=thin+aluminum+sheets+for+crafts PDF link annotation
    • http://jesubenodewopob.22web.org/unilever_bursary_application_forms_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/zujijivopuju/HhhTHZt/40741341154.pdfIn PDF document text
    • http://gamukanemafutu.mywebcommunity.org/carrion_crown_part_2.pdfIn PDF document text
    • https://cdn.sqhk.co/zanewijepex/yogibi6/99999605638.pdfIn PDF document text
    • http://balonedud.iblogger.org/51559838465.pdfIn PDF document text
    • http://zonidapobup.22web.org/excel_urgent_care.pdfIn PDF document text
    • http://kutatit.getenjoyment.net/supernatural_cast_season_13.pdfIn PDF document text
    • https://cdn.sqhk.co/raninogozo/YjigdA7/wilhelm_scream_sound_effect_compilation.pdfIn PDF document text
    • http://javaxirivibewi.mygamesonline.org/59391409688.pdfIn PDF document text
    • http://deworul.22web.org/bedikat_chametz.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/2icm0jh/retro_missile_command_arcade_game.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/how_to_make_table_design_in_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/8683022686.pdfIn PDF document text
    • http://govujetimavex.epizy.com/doxanugibu.pdfIn PDF document text
    • http://regadozemi.epizy.com/lezemisulawamelitobakipas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e9d67f7-b610-4213-b54d-af289fbf3446/dapapipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d8257ba-3663-4a30-96c9-396b59899d2a/moxakesu.pdfIn PDF document text
    • http://misibinebob.epizy.com/finance_executive_interview_questions_and_answers.pdfIn PDF document text
    • http://vedogitunenaki.rf.gd/lozebetenuj.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/mumelavowamu.pdfIn PDF document text
    • http://bafilus.epizy.com/14307576254.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/kadigipijikotuxudunibix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a249556e-cc9e-48e7-a3fd-b7f3c1187239/7044278690.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/tawasus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b7acc37-dd85-4e9e-ba39-4623b18d61be/kenmore_80_series_gas_dryer_not_heating.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_off0000d82e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD82E 5072 bytes
SHA-256: 48bc908b4d2aa2fe05cb4709dad6001ac185ff574210ca1fcd315d46ad2016e8
font_01_sfnt_off0000e93e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93E 12136 bytes
SHA-256: 34defb8069b785e2e6597187ba2f578faefc149e8892eb8b41401b975dcbac31

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