Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c8cd3d5714260df…

MALICIOUS

PDF

81.1 KB Created: 2021-04-24 23:14:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: af7e3e8883f351f52dff505f41d0e0fc SHA-1: 59eb456b4f1e44801c0addfb838b68919315d57f SHA-256: 5c8cd3d5714260df71068c430e2447b9ea346777e62cb01d1674c10a70c682bb
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 0.9996

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/strik?utm_term=scoring+likert+5+point+scale PDF link annotation
    • http://justiciaforjustice.com/duzifagofb3o7a.pdfIn PDF document text
    • http://vwwv-avito.online/viwudodunebajixawut37evj.pdfIn PDF document text
    • http://foyou.store/advanced_level_vocabularyii0vq.pdfIn PDF document text
    • http://policyhelpcenter.com/1317363447zlu86.pdfIn PDF document text
    • http://nout-prokat.website/51213412401rpt7a.pdfIn PDF document text
    • http://niburufajanuto.sportsontheweb.net/42765764283.pdfIn PDF document text
    • http://hydraruzxpnew4af.exchange/34447598033xxs2x.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://govnosiakxws.online/saxizilubituronexumataberoz2et.pdfIn PDF document text
    • http://kekewawoxugar.sportsontheweb.net/79547908335.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf3acb77-73b6-46aa-b0a2-ae9d7cc37adc/50990219451.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f47214ce-9cbf-4859-9e8f-4b3f572a0a97/norufutox.pdfIn PDF document text
    • https://4adff18d-dc39-4349-be2c-eeb12737f1cb.filesusr.com/ugd/9117e0_64cd32bd87a846a3b2175eb0a252da63.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/36119b2a-8874-4c38-b6f6-da13ed683e16/how_to_reset_garage_door_liftmaster.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e226b618-6030-41e7-8f90-9c869b4f1de9/sketching_from_the_imagination_anime__manga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/271ae632-3655-4ad1-9a67-12c4ad46c2e1/bose_soundbar_remote_codes_for_lg_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47bd7842-9ea6-48a3-ab0e-a0ac12e3247e/unication_g5_programming_cradle.pdfIn PDF document text
    • https://aed0ee3a-d217-4696-a563-de9ff15d6c37.filesusr.com/ugd/f80e3f_21aaddf3f2e84645965c8ee7f6dd144f.pdf?index=trueIn PDF document text
    • https://182222a4-a7a4-434f-839c-7103b506edb5.filesusr.com/ugd/224a67_7f6d4103eb6b44328588b3e5194914b1.pdf?index=trueIn PDF document text
    • https://f2d828cf-06d9-46ea-85af-d88b0bc20d44.filesusr.com/ugd/501a20_4dff1a01d4c74d6981eb042316b2acc0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3c9c1b3-8d3a-4a1d-866b-ad9d4ef5f5d2/dama-dmbok_functional_framework_version_3.02.pdfIn PDF document text
    • https://c301b42c-deab-4116-afcd-a09dd0728425.filesusr.com/ugd/4bb894_d4787b81dc324e008e9ac416c78f69b8.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_off0000fea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA6 5392 bytes
SHA-256: 5afc7e4eb87ff1ceeb4f3db411b4c9e22b0f16cb7cab0984214ea4c864290846
font_01_sfnt_off00011110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11110 11108 bytes
SHA-256: 6309cdcfe154e557d271a1742136cd0b2ec2bcd9dab1fb8855e9436c7eee26b7

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