Malicious PDF — malware analysis report

Static analysis result for SHA-256 24fcb71611ba0f0a…

MALICIOUS

PDF

76.3 KB Created: 2021-03-23 04:12:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d3f503eb15dc4544e943d6206617e1b4 SHA-1: 1a7a2bbf58451d3f18f67402c3d39c2a0cbfb3fa SHA-256: 24fcb71611ba0f0ab2757aa65ebbbcea855550b7ddbf95454eedc20626ce0d19
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://jacksth.ru/wix?keyword=battlefield+5+the+last+tiger+letters PDF link annotation
    • http://koteyarn.moscow/zimizupudakupuwuzulav3hay0.pdfIn PDF document text
    • https://cdn.sqhk.co/xaderimi/9JjhjcW/72954786416.pdfIn PDF document text
    • http://bigmagazin.xyz/historia_de_las_brujas_de_salem13iva.pdfIn PDF document text
    • http://bumomuvo.iblogger.org/do_all_hot_water_heaters_have_a_reset_button.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380078/normal_6021c3ba98ac9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494681/normal_6038b6e36a041.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419204/normal_60111de79c03b.pdfIn PDF document text
    • http://xilibinebosapeg.mywebcommunity.org/aircraft_structure.pdfIn PDF document text
    • http://kemytbok.xyz/gramofon_waltz_piano_sheet_musico9xz8.pdfIn PDF document text
    • https://cdn.sqhk.co/zipedufipiz/ibgjhzJ/brick_game_app.pdfIn PDF document text
    • http://xexodejefapupel.iblogger.org/tracheostomy_care.pdfIn PDF document text
    • https://cdn.sqhk.co/bexuxoxabim/ar7anro/list_of_petroleum_engineering_colleges_in_maharashtra.pdfIn PDF document text
    • http://circulshtangcalip.website/jidewusezixufedjoik9.pdfIn PDF document text
    • http://spencermcman.us/lg_mini_split_ac_installation_manualcjbzv.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
    • http://tijivetax.epizy.com/how_to_play_backgammon_for_beginners.pdfIn PDF document text
    • https://86908e24-11f3-43a1-9346-bf531f45ee0b.filesusr.com/ugd/97493d_ac96488b9e62497291eb238c45120a15.pdf?index=trueIn PDF document text
    • http://nowibitiki.epizy.com/luname.pdfIn PDF document text
    • http://gajutar.onlinewebshop.net/alimentacion_complementaria_oms.pdfIn PDF document text
    • https://30372bae-fb3d-4285-bee0-d91e70c22047.filesusr.com/ugd/835091_056e8e4250624921aa1bae355c83f354.pdf?index=trueIn PDF document text
    • https://55963656-6eb1-4b25-bcd5-bb835d65808b.filesusr.com/ugd/0064ae_98bb0b34929c4d168467ef293068511b.pdf?index=trueIn PDF document text
    • http://riveminigokoxa.myartsonline.com/juxerutafipom.pdfIn PDF document text
    • http://zipulosi.atwebpages.com/74879978841.pdfIn PDF document text
    • http://budavazej.epizy.com/attitude_definition.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_off0000e1eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EB 4912 bytes
SHA-256: e48b402b9739d77395e32f5cb34f4c9f019321ddd6b83655a76c62df81796d1e
font_01_sfnt_off0000f2aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AA 10376 bytes
SHA-256: 24cbda68e07021e5dc631fc2b6e730f17a7b611f3bdfc8e6920d61ded4ce2403
font_02_sfnt_off000115b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B4 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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