Malicious PDF — malware analysis report

Static analysis result for SHA-256 1294d9996db06918…

MALICIOUS

PDF

71.2 KB Created: 2021-04-07 23:37:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 368b82cd5b12bd6219d1e648d45d4a7a SHA-1: 706386fba273acd1a87b8753e93e1a9bcdbd878b SHA-256: 1294d9996db069182e7384e43eb174b4941932c173f95cb7932880759e5e9cd8
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://bologen.ru/wix?keyword=prentice+hall+realidades+practice+workbook+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4389085/normal_60497dde82aae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464302/normal_6037b9687de34.pdfIn PDF document text
    • https://cdn.sqhk.co/zejizoguzut/Joggchb/happy_wheels_unblocked_demo_hacked.pdfIn PDF document text
    • https://cdn.sqhk.co/nobutowug/hiVtNij/63552969753.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393359/normal_604f67923b46d.pdfIn PDF document text
    • https://cdn.sqhk.co/getabemuto/hcqbf2O/ashes_cricket_game_play_store.pdfIn PDF document text
    • https://cdn.sqhk.co/vunebapenuj/VciehdP/piggy_book_2_chapter_3_release_date.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422382/normal_603eb92d636a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365636/normal_5fce326cf0be9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://setovoj.onlinewebshop.net/gabiwixila.pdfIn PDF document text
    • http://madepadejatutof.onlinewebshop.net/eureka_vacuum_cleaner_spare_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15860208-9638-4c81-904e-5eaff721821f/ganevesemew.pdfIn PDF document text
    • https://36071b1a-d853-4ad1-bccf-0ed894d94038.filesusr.com/ugd/906e9f_1e8e6891d9e44f84bf2b6fe51ee06bce.pdf?index=trueIn PDF document text
    • https://1a413096-4115-453c-84a6-e19f3d0a1e7a.filesusr.com/ugd/4a2d03_097e6b779fea45b29be970ece656e02c.pdf?index=trueIn PDF document text
    • https://5c839259-519f-4cee-a1a2-6639d654070b.filesusr.com/ugd/140efa_7f660297871944bea1581aac1281db8f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a8d1c54-f9da-4caf-8de3-252c2ce1a927/62991648760.pdfIn PDF document text
    • https://dda5c79a-a75d-44d9-a006-48dec3bfe172.filesusr.com/ugd/115d6e_3244a29e93b14435b3ca27e1914dd8fa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/87967adf-540c-4f50-b043-cee169f97dc4/vicks_vaporizer_for_baby_cough.pdfIn PDF document text
    • https://54179944-c6a3-49b3-9462-5d1939b6aff2.filesusr.com/ugd/49f5ef_934c788887b54e579bfa7679fb46e149.pdf?index=trueIn PDF document text
    • https://99442e0c-e188-470f-b1e9-a2082f9e7f28.filesusr.com/ugd/2274a7_336744440d4c46d8a466087096c8242a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ff62671-cbf9-4c5d-b766-cd72a11d8d91/reremunebobefosegofifikas.pdfIn PDF document text
    • https://7915398d-c9c2-4241-abdb-40cf742e4b8d.filesusr.com/ugd/d4df0f_94bc439e441e46069d721a6ce2aaacb5.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_off0000d71b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD71B 5456 bytes
SHA-256: 8b2420779fc9fc8dd179943f2def8761eeccc9d5f3ced603d042a368e842cacf
font_01_sfnt_off0000e9b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B1 11016 bytes
SHA-256: 7988970cd566ffabf3dd97c46e33edb66067ba359ebd371e56f786df282218ec

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