Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ffce1edceaa6398…

MALICIOUS

PDF

69.7 KB Created: 2021-03-08 22:40:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ec0495d81960e11126e71d76369f9fc4 SHA-1: 27b71174057ad2388fd20b06a0b90d0fcef080cd SHA-256: 0ffce1edceaa6398b3a1fdbfc630b3d986447172452bb940a1313ff7ca120288
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wix?keyword=reactions+of+acids+and+bases+worksheet+answers PDF link annotation
    • https://wolunogejafijut.weebly.com/uploads/1/3/4/6/134649672/latufujegufofijumane.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484815/normal_5ff66a2176897.pdfIn PDF document text
    • https://lufisadoxusixa.weebly.com/uploads/1/3/4/5/134583632/lopudakuwo-fojeze-wumiwawog-fiwozanuduj.pdfIn PDF document text
    • http://zhenskiizhurnal.ru/bajobazonapipemalilar4dw7a.pdfIn PDF document text
    • https://suxokigivulumu.weebly.com/uploads/1/3/4/4/134479742/nekusabusizopogumu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407102/normal_5feb6035dac65.pdfIn PDF document text
    • http://workbykoder.xyz/how_to_use_a_relion_digital_thermometer0o612.pdfIn PDF document text
    • http://trellos.fun/33519476270qnnzg.pdfIn PDF document text
    • http://websporizle3.com/xezuwilps5v.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4a7d9d2b-1d67-446c-8d6d-bdd3043d1f60.filesusr.com/ugd/c3d078_21e3b7b20c1d4abfbb91e2a76923faa4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/21524772-8399-4f9c-a8ff-881d58fd7ed7/rounding_numbers_worksheets_5th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d4fb346-53ae-4f91-8617-1cc0f181da93/17870577416.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/activeperl_5._16_32_bit.pdfIn PDF document text
    • https://4bf641bf-117a-4913-931f-55e49063997f.filesusr.com/ugd/5befcb_04aac4f42a0347a68097e3aebf4f1469.pdf?index=trueIn PDF document text
    • https://f4b9ed98-44c1-44e6-9966-d9817cd43de7.filesusr.com/ugd/9ced5d_0ce534f7607840b8b5fc2d58e0d0a83d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/59967278153.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_off0000cb91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB91 1684 bytes
SHA-256: 8b69ad8bf8706a8de8604f0485c67fb25a23b24d50174afbb8bbf061f3c53837
font_01_sfnt_off0000d3f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F5 5380 bytes
SHA-256: 789dd6b490b40403f9f3de5e09e36f124737ce74ad5502252e42f332b1fd46f3
font_02_sfnt_off0000e650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE650 10196 bytes
SHA-256: 42d882826f3e77a21025c9731701f874cea0a0c5327d5e5c3e12830ed8742e4f