Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e7f6f2984dfbeb…

MALICIOUS

PDF

80.4 KB Created: 2021-03-29 06:58:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: fb955ee08d4281db08fc166940b8f1aa SHA-1: 7eee8503ef3091ce716002dcbd7a76565adcae19 SHA-256: 80e7f6f2984dfbebb5a787b377b7a3955d8f4fcacb77ab59836ae8a811b03f7a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by heuristics as a link farm and by ML as malicious. The ClamAV detection and ML score strongly indicate malicious intent, likely related to phishing or malware delivery via these external links. The document body, though heavily obfuscated, contains keywords related to 'Addison's disease treatment pdf', suggesting a lure to attract victims.

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://botokaw.ru/award?keyword=addison+s+disease+treatment+pdf PDF link annotation
    • http://scrlt.xyz/777519884ds2rb.pdfIn PDF document text
    • https://cdn.sqhk.co/xurazegoba/UDKTjUU/39682575637.pdfIn PDF document text
    • https://cdn.sqhk.co/kemivabesu/hehhhgi/66645571229.pdfIn PDF document text
    • http://sallehub.xyz/fountas_and_pinnell_running_records_scoring_guidermc0d.pdfIn PDF document text
    • http://nijewogifuzazi.mypressonline.com/salem_oregon_map.pdfIn PDF document text
    • http://japamawosoj.mygamesonline.org/suwulemum.pdfIn PDF document text
    • http://oneplusonemain.xyz/c_technical_interview_questions_for_freshersa7ajt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473890/normal_5fe48e8fb1b0e.pdfIn PDF document text
    • http://xajavawinereko.mywebcommunity.org/33616812344.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367617/normal_601854a12d9c1.pdfIn PDF document text
    • http://physcoo.com/43149848457pi66k.pdfIn PDF document text
    • https://cdn.sqhk.co/jomububorava/jeChgeb/xuxokigijud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497344/normal_6023bdb22949b.pdfIn PDF document text
    • https://cdn.sqhk.co/jomenuluz/XijbUhd/24889832067.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/geradi/xepulaguputegufopo.pdfIn PDF document text
    • https://e7c02ae7-ba66-49ef-8fe7-d4c265c54a1b.filesusr.com/ugd/bc5701_99fdd6759ae144b8acb8b228685668bc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xapota/screen_capture_android_galaxy_tab_pro.pdfIn PDF document text
    • https://d33b8dfc-9792-4d26-9d81-613d0bd32a71.filesusr.com/ugd/d34367_2609b3819d8d45268043fff5fd06bf76.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tuxexi/huawei_mate_20_lite_aggiornamento_android_10.pdfIn PDF document text
    • http://zekezixurul.onlinewebshop.net/sulemu.pdfIn PDF document text
    • https://9f61dd91-ea7e-4edc-a837-c43fae5dccfb.filesusr.com/ugd/ed897c_85cf2586c79446968a84d9adfe103807.pdf?index=trueIn 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_off0000fddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDD 5144 bytes
SHA-256: c53d0bf5b769b1e4fe9b5f05dd1f1a81ea46b042e4e2cd9ce9b6b762af205980
font_01_sfnt_off00010f47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F47 10760 bytes
SHA-256: a010ca504bd60333eef4b9cae6b6cc72a90392ada87dfe192a7ee5a7edbea72e

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