Malicious PDF — malware analysis report

Static analysis result for SHA-256 04f274d6a9ebd881…

MALICIOUS

PDF

82.1 KB Created: 2021-03-26 12:44:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0c596a8a5ce97a62e7e888171f9b34f8 SHA-1: b6985cd2105a12a51a8dafdc48ce4221385718a0 SHA-256: 04f274d6a9ebd8811c48fbcdd29cc0a7061efef0095662379665e719e30ffccc
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 0.9998

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://xajibur.ru/123?utm_term=how+to+use+bokeh+effect+android PDF link annotation
    • http://barajofa.mywebcommunity.org/tazebup.pdfIn PDF document text
    • http://proita.space/nitajeluzaragapejm1wcd.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://vitrinachel.ru/category_b_biological_agents_shippinggmtxz.pdfIn PDF document text
    • http://boraguw.medianewsonline.com/tesis_de_calidad_de_vida_en_adolescentes.pdfIn PDF document text
    • http://myyshooop227.site/what_is_the_difference_between_agile_scrum_and_kanban4kupz.pdfIn PDF document text
    • http://nakotigolajeg.scienceontheweb.net/tumedonugowiku.pdfIn PDF document text
    • http://creamwalls.online/41063708451hqd99.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dfa52777-3edb-460f-9b14-ca5101cd4ecc.filesusr.com/ugd/5360f8_1d1e50853d004429a39b5045b7342c54.pdf?index=trueIn PDF document text
    • https://6dca1d0c-b102-4aa4-a312-d013f97c39dd.filesusr.com/ugd/fb87fb_f51b944f1a5e469d90d982f06f79bfc8.pdf?index=trueIn PDF document text
    • https://d190c387-1498-4382-a59e-98d1a0a9794c.filesusr.com/ugd/a91264_2e447b90caee4b20b2ac9b1453ef07a0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bda923e2-133d-499e-ab24-56d79d37aa36/80268168298.pdfIn PDF document text
    • https://a5a7f18c-b887-48a0-80cc-3627c14345d5.filesusr.com/ugd/609f59_5b8309fc54714857bbf0bb71664317da.pdf?index=trueIn PDF document text
    • https://6d706a39-1f93-4f1a-9423-caccf7e65e71.filesusr.com/ugd/69f91f_3da3ff7dce3d40dfacd6faf69ade5b71.pdf?index=trueIn PDF document text
    • https://ac4cd5cf-e861-4b1b-a585-e47049f737a6.filesusr.com/ugd/843280_3be6b7d746134ca8874afa2a094f8117.pdf?index=trueIn PDF document text
    • https://70848fb0-0fd0-490a-9360-2ffa38fc212c.filesusr.com/ugd/08e331_b2ca57254707419e82219df5fefba540.pdf?index=trueIn PDF document text
    • http://xazopufegi.onlinewebshop.net/33831728423.pdfIn PDF document text
    • http://kedisijusa.onlinewebshop.net/nojafoxikukofivafoxapu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3a0cddf-3c4a-4674-bfac-c5b8529db503/vanity_fair_movie_cast_2004.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38cbf10d-d583-4de9-8f6b-d9f7dfcf6f31/harry_potter_butterbeer_recipe_starbucks.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_off0001050d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1050D 5336 bytes
SHA-256: 4a076081791171ab7774894be5e9d0aa2a852bfc9f4b5f688ab8b30c2910c8b5
font_01_sfnt_off0001173d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1173D 10620 bytes
SHA-256: 98bc4032eb9ce759eac93a53a3ad0f2484fcae2f1d2a0ce34f2ae4a9ed0222a1

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