Malicious PDF — malware analysis report

Static analysis result for SHA-256 12ddb82f27d050bd…

MALICIOUS

PDF

92.7 KB Created: 2021-03-13 16:58:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ca95f6844a212588f04235b31acd1027 SHA-1: b8a070851bd662ea8679dfdbe972601e92d5f961 SHA-256: 12ddb82f27d050bdb7411efc862c2d7643ab4a53d50e580147a9ec08535799fa
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://gimoguvi.ru/award?keyword=l+atomistique+exercices+corrig%25C3%25A9s+pdf PDF link annotation
    • http://wozupabalaviv.medianewsonline.com/12635157183.pdfIn PDF document text
    • http://nibewubixela.getenjoyment.net/stem_cell_therapy_for_heart_disease.pdfIn PDF document text
    • https://cdn.sqhk.co/pefisemise/jaED2gj/30839613415.pdfIn PDF document text
    • https://dolibaradodusop.weebly.com/uploads/1/3/4/5/134595809/xowopupapa-tadoxi-dusubakavugige-ditiviri.pdfIn PDF document text
    • https://cdn.sqhk.co/bareziwo/fmGjdjg/44653302127.pdfIn PDF document text
    • http://zedateve.mypressonline.com/fofopaw.pdfIn PDF document text
    • https://pikotawikeju.weebly.com/uploads/1/3/4/4/134496208/a00ca426.pdfIn PDF document text
    • https://cdn.sqhk.co/dikizumi/iizK4JN/escape_detention_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/luvafuza/UmwihjQ/junarubu.pdfIn PDF document text
    • https://cdn.sqhk.co/nunamarajop/jFjiZhb/gartner_magic_quadrant_crm.pdfIn PDF document text
    • https://xepozumer.weebly.com/uploads/1/3/1/3/131380160/1133649.pdfIn PDF document text
    • https://direwuberegenis.weebly.com/uploads/1/3/4/3/134361890/913945.pdfIn PDF document text
    • http://manuximaxemeje.scienceontheweb.net/86182487113.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/zewimu/nawawonuluninodulamil.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/corel_videostudio_2019_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bdd08fd-4ecf-4091-98a3-e27a97f03e38/kawaii_how_to_draw_really_cute_stuff_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67df41b8-2019-4843-86e6-a19a483fd2e5/how_to_clean_fisher_price_swing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb10debd-28db-4405-8318-4ee831c9b251/80918167995.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa5a2625-5898-4227-b0cc-3ffbde32dedf/sosexefemene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea9f2944-426c-403d-83e1-1c17b465a39b/70426143410.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/gokiritusuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cb0716b-46ae-498a-91ac-a6bfdcd29748/58806538252.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b78fc91-69a0-4c41-985a-c77aee59ab7b/who_are_the_gatekeepers_of_the_criminal_justice_system.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_off0001266e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1266E 5720 bytes
SHA-256: a2173e2ffeb12ffa748b7a6788e5cee48e4767c6f3a2a0493584bdc3e8456df5
font_01_sfnt_off0001398b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1398B 12712 bytes
SHA-256: a726740a372f31ef1f447d1e5f26d7bc2266d4cc90425e2c351befa83dd76272

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