Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3a092073fe1b068…

MALICIOUS

PDF

80.5 KB Created: 2021-05-09 23:00:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e53b7394e970a4cc5d8eba01937a323a SHA-1: 982f105e6657e7cc761e2cf1eb8b664a005ff204 SHA-256: a3a092073fe1b0681be79717440e94a9549d46097fffa5ea1851e3edc2125aeb
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 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crophysi.ru/strik?utm_term=evh+5150+iii+50w+combo+1x12 PDF link annotation
    • http://helpverifybadges.com/negiwekebajulavii2pci.pdfIn PDF document text
    • http://tameenegypt.com/plato_apology_and_critoh026p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491168/normal_605dbab6ded4c.pdfIn PDF document text
    • http://dodapim.22web.org/benny_and_the_jets_piano_sheet_music.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491414/normal_5fde43b2da252.pdfIn PDF document text
    • http://hesap-al-sat.com/how_much_do_babies_sleep_at_3_monthsh4dfu.pdfIn PDF document text
    • http://qupieasy.online/68765171678phi5m.pdfIn PDF document text
    • http://lakujalinifibo.mypressonline.com/bringers_of_the_light.pdfIn PDF document text
    • http://securespot.ru/how_do_i_apply_for_the_hope_scholarship_in_tennesseen45mq.pdfIn PDF document text
    • http://lukisasore.mywebcommunity.org/portrait_photography_lighting_tutorial.pdfIn PDF document text
    • http://itash.space/rowuketuxevujihsvp0.pdfIn PDF document text
    • http://sait-ok.ru/ripubibomunafq4i8e.pdfIn PDF document text
    • http://8gusevshop.website/centurylink_email_supportcch9i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404512/normal_60383fb406afe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487201/normal_6052d3bb4b16c.pdfIn PDF document text
    • http://yildirimotobursa.com/convert_scanned_to_jpg_online_freebo6rn.pdfIn PDF document text
    • http://tuwimig.scienceontheweb.net/2516914557.pdfIn PDF document text
    • http://dronextactical.xyz/c_programming_tutorial_video_free_download_in_hindibvewy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481282/normal_6068bb4378b8a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lozabozirazal.rf.gd/human_anatomy_and_physiology_laboratory_manual_11th_edition.pdfIn PDF document text
    • http://wosoremozojofam.epizy.com/fokonelom.pdfIn PDF document text
    • http://bividit.rf.gd/88116376025.pdfIn PDF document text
    • http://takefaluzimun.rf.gd/65090836760.pdfIn PDF document text
    • http://zapusov.atwebpages.com/nejujutepaxamemene.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_off0000f92e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92E 5288 bytes
SHA-256: ffb26f7e6970c44fba62543a1d5cfef5d9c321f16e2446ef93030e0d0793ba0d
font_01_sfnt_off00010b35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B35 11804 bytes
SHA-256: 1abbd4b574124abe0a50cbb9076e6de4687e11f739a29b3c906046cabcc443da

Open this report in the interactive analyzer, or submit your own file for analysis.