Malicious PDF — malware analysis report

Static analysis result for SHA-256 61c60f45be891c12…

MALICIOUS

PDF

79.7 KB Created: 2021-03-28 20:00:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 750cad52047d35b6030d61a8335e4261 SHA-1: d8ac839e3b03b9afd9a72d68fb0ab33dc4eff5bb SHA-256: 61c60f45be891c129145386fb29bba8696467f5578471c05b17dee439df59f29
126 Risk Score

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 0.9990

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://xezojetit.ru/wix?keyword=brown+bear+behavioral+adaptations PDF link annotation
    • https://cdn.sqhk.co/dolitife/ijeifgc/77197155295.pdfIn PDF document text
    • http://fuziral.iblogger.org/shark_navigator_lift-away_professional_nv356e_manual.pdfIn PDF document text
    • http://filaminipanugin.iblogger.org/first_and_second_conditional_sentences_exercises.pdfIn PDF document text
    • https://cdn.sqhk.co/kenipafitu/gcVnMij/ga_commuter_rail.pdfIn PDF document text
    • http://vuzitofakomuj.22web.org/dafunumalexi.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwutelurew/2jbhfic/argentina_vs_england_world_cup_mexico_1986.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/831fc686-39db-43b2-800d-1d0524fa3911/wokarisoluxa.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/muzoj.pdfIn PDF document text
    • http://sujegulagu.epizy.com/zitipoxabejani.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/padulezulurixukid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bea4f17-2ad8-4948-aa9d-c77b2a8dfc99/is_the_book_hatchet_fiction_or_nonfiction.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/401878f4-d396-4a94-850f-b2a427a6d6f0/calvins_institutes_online.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/terifosuvimutagavebediw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/868e5315-9a44-45a0-849c-84c68f0bb4e5/google_maps_has_my_home_address_wrong.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3549b59e-2489-4de6-8dd7-9aaf6c4d807d/the_practice_of_statistics_6th_edition_teachers_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/the_penelopiad_chapter_24_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/44440632753.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/249873a1-09c7-46c4-b71b-13ad464db8ee/36498532949.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/unfamiliar_words_using_context_clues_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4981d79a-a5ba-4d69-acc6-65e1d6498c60/36289946065.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cadd14e-2e60-40a3-b471-b1463e88b969/microsoft_word_document_border_templates.pdfIn PDF document text
    • http://fedaposadado.rf.gd/analyse_swot_exemple_d_entreprise.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/rawaxavigagekorubujonodi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecdc4bfb-515e-4ca8-823d-0e71e9b412d7/figikinejupenejisak.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/19377363742.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_off0000ec41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC41 4328 bytes
SHA-256: 56c640ee5c10a302918cdac78252f682437a086f1aca66138c52c920e407b0c9
font_01_sfnt_off0000fb6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6A 5388 bytes
SHA-256: 0535916f85c7c6f8fc560c1693e761fc5eb75454c9e4a5fb8e849aab89d93473
font_02_sfnt_off00010dc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC6 10220 bytes
SHA-256: b1a6faf1295ad40d1108c773ee195426188c32ab62833762e28f9ffedd9d80b6