Malicious PDF — malware analysis report

Static analysis result for SHA-256 d190afdb04b05a79…

MALICIOUS

PDF

82.1 KB Created: 2021-04-03 04:04:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2490f9547cbd9420316cd6d5726f2907 SHA-1: 724347b39f10cfd54878958c863a57f6d352535b SHA-256: d190afdb04b05a79e367c44172a90fd26b70e392fa86bf8ad4cca0a13b7d01a9
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 0.9992

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://resalured.ru/strik?utm_term=ps4+diablo+3+save+editor PDF link annotation
    • http://varistop.site/urdu_books_whatsapp_group_linkz8hkr.pdfIn PDF document text
    • https://pinozawekik.weebly.com/uploads/1/3/4/5/134589254/63857.pdfIn PDF document text
    • http://pitushok.space/matrox_monarch_hdx_setupqeqnd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420238/normal_6027620bf3d6a.pdfIn PDF document text
    • https://cdn.sqhk.co/gasidonoda/RFgcTmz/6140969155.pdfIn PDF document text
    • https://xujeloza.weebly.com/uploads/1/3/4/0/134096435/af290.pdfIn PDF document text
    • https://subutadenurafo.weebly.com/uploads/1/3/4/5/134581349/labes.pdfIn PDF document text
    • https://cdn.sqhk.co/kufedefivuvu/ghibvgh/slimeatory_challenge_videos.pdfIn PDF document text
    • http://natikolom.site/mass_media_law_20th_editionvwr8c.pdfIn PDF document text
    • http://nitiwopororotef.mypressonline.com/tuwoba.pdfIn PDF document text
    • https://cdn.sqhk.co/vilomikov/gcnDgiG/32923847395.pdfIn PDF document text
    • https://raxagipob.weebly.com/uploads/1/3/4/8/134883443/9812674.pdfIn PDF document text
    • https://daniveledize.weebly.com/uploads/1/3/4/9/134900130/9891053.pdfIn PDF document text
    • https://cdn.sqhk.co/nupegefozub/jiyd6dW/survival_island_evo_2.pdfIn PDF document text
    • https://cdn.sqhk.co/nukusigemug/iSgdhf2/81495796196.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497395/normal_6025a275b6840.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xedemigu.atwebpages.com/plot_diagram_example_beauty_and_the_beast.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/insect_identification_guide_book.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/how_many_devices_can_connect_to_velop.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/belt_guide_sewing_machine_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/wakavomigawojawikipiresez.pdfIn PDF document text
    • http://zodofujeki.atwebpages.com/76849023921.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/68541304682.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_off000100f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F7 5272 bytes
SHA-256: 09c10b86ef997fb111122ce9a5942c3aec7b534e105ef8d10cdf85e6317ae208
font_01_sfnt_off000112fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112FA 11640 bytes
SHA-256: a30e7139ba683180a5c73e1394b1be6525a4c2e500b8c37ee2107bf5bd7cc98e

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