Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5fb007d223fe6fc…

MALICIOUS

PDF

81.6 KB Created: 2021-03-06 08:56:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4ad57619f18e59617542b26c4546cc64 SHA-1: c870084b8a915c635c416c3e9c0b13411aca730b SHA-256: f5fb007d223fe6fc94d927681b18f01e3fcd74e8bd2d5f77dbe86ad97c704031
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains an embedded URL that redirects to a phishing site, disguised as a game guide. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or credential harvesting. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://midufefew.ru/123?utm_term=pokemon+y+game+guide PDF link annotation
    • http://golixudib.mypressonline.com/fundamentals_of_engineering_economic_analysis_1st_edition_free.pdfIn PDF document text
    • http://gefosezidubajoz.scienceontheweb.net/gijelexujewo.pdfIn PDF document text
    • http://nepatokada.mypressonline.com/cuisinart_dbm-8_user_manual.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://217ba8a6-026c-4a9e-b1ce-2eadff0a4a08.filesusr.com/ugd/3d7af5_b16730753105413580011e7c68d7e0be.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a767c4d-d2a3-46fc-9039-e5b96eeb4754/fluke_networks_ms2-ttk_microscanner2_pro_termination_test_kit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65cbedef-0a8d-450e-98cf-1a8bafd8a1b0/conscious_discipline_training.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/67352149998.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/between_and_among_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/durga_amritwani_video_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/what_are_the_limits_on_agency_power.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/aptitude_test_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ebcf401-150e-4672-9246-a73b54994dc0/vulagitikubexovimeparoraz.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/89852426288.pdfIn PDF document text
    • https://937a8a2d-b41a-4163-aff8-eda6db263557.filesusr.com/ugd/21e6f2_92bc89635b04403ba2062d44521da157.pdf?index=trueIn PDF document text
    • https://387a498e-9551-4239-9507-3183ba214552.filesusr.com/ugd/cd403b_40a3d0a7dd3a494093385989ab41493a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/45078367847.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40e52043-7fc4-4031-8ac8-e1d1a1d83f9d/how_to_access_secret_samsung_tv_service_menu_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ac19f13-6576-46c6-bd07-f2a399e32ec1/88726506085.pdfIn PDF document text
    • http://diwavubodinaroj.myartsonline.com/dewalt_d55146_type_8_parts.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_off0000f413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF413 4808 bytes
SHA-256: 03aa3d282ae1ccf9da824e88f1b009044f79ca44791033f98480b201db695bf6
font_01_sfnt_off00010454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10454 11524 bytes
SHA-256: 33420e2e510a74825959fb4df475b74c361acf43abe23679c7972c714ebc59dc
font_02_sfnt_off00012b58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B58 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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