Malicious PDF — malware analysis report

Static analysis result for SHA-256 53203cf9ade3026b…

MALICIOUS

PDF

79.4 KB Created: 2021-04-08 04:36:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b0ff7e71f8abc7d4ff9e10328c108f7d SHA-1: 91a25078ab8f80e3fb62c0f0309150ed13108901 SHA-256: 53203cf9ade3026b0ba03d29f7cd4ca27100242e7fe95ea13ad2164bc760c812
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://bologen.ru/wix?keyword=beowulf+anticipation+guide+heroism PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465538/normal_6055833d38b55.pdfIn PDF document text
    • http://jenuxijaf.mygamesonline.org/adagio_de_albinoni.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413713/normal_5ffd1300e47b2.pdfIn PDF document text
    • http://pemufosapakem.mypressonline.com/malaria_causes_treatment_and_prevention.pdfIn PDF document text
    • https://liwitozawaben.weebly.com/uploads/1/3/4/0/134042828/levud.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/bEfibha/scrap_copper_prices_near_me.pdfIn PDF document text
    • https://mepokebifonamos.weebly.com/uploads/1/3/4/0/134096039/bakudapugumewoviw.pdfIn PDF document text
    • https://cdn.sqhk.co/tosilura/gcjfhhR/ninja_run_2019.pdfIn PDF document text
    • http://diluzadumavotux.getenjoyment.net/vezevovikabawe.pdfIn PDF document text
    • http://bazunujovi.scienceontheweb.net/11_22_63_watch_online_english_subtitles.pdfIn PDF document text
    • https://cdn.sqhk.co/fosuzonarefi/RibIgdQ/25962045363.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481286/normal_602beea4b26a8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/200b22fa-7e74-4b22-99c8-c0eba5b8d9d0/16454553015.pdfIn PDF document text
    • http://zilowovuv.atwebpages.com/b._f._skinner_behaviorism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1e9820b-e263-42e9-9557-e8cde3fb5455/what_animal_is_akela_in_the_jungle_book.pdfIn PDF document text
    • http://visugog.myartsonline.com/automatic_control_engineering_raven.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a869b760-15f2-4a46-9a90-43b782cee2cf/como_trabaja_un_alternador_de_carro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89698e81-26cc-432f-b03c-9816458a5e21/bosejajemujatuxarezij.pdfIn PDF document text
    • http://gegurobaz.myartsonline.com/25444620716.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9614280-7bf2-48ac-9de3-e426c4b1ee9f/19383808649.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F8 5592 bytes
SHA-256: 4df32f23068cf2d602f31b7f5e6de0962a55b1a4a74669bf7671204f0e18b108
font_01_sfnt_off0000fce8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE8 10480 bytes
SHA-256: 862d6c95387fe9b9341b4b6e0724ff1f0e9113fa2ba88c6ab54423ec1f1042cf
font_02_sfnt_off000120a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A5 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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