Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a8d1eb319183ce1…

MALICIOUS

PDF

76.4 KB Created: 2021-03-20 17:52:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0c7d59d1c7411b82e5de9ef7b4a80c7f SHA-1: 56d60e58d1ca6476121b5982a7bb15afa3795356 SHA-256: 5a8d1eb319183ce1be8a2a2b7e5c8b98daa065e2b65725a66cb3b0f880c060e7
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://seumenha.ru/wix?keyword=infinite+flight+mod+apk+19.04.2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408871/normal_601e1e51be2c6.pdfIn PDF document text
    • http://novazeku.mygamesonline.org/87882608366.pdfIn PDF document text
    • http://kavuxolabazili.iblogger.org/website_terms_and_conditions_template_uk_gdpr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420250/normal_60359e9683319.pdfIn PDF document text
    • http://lipazegeboludep.sportsontheweb.net/10521124386.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490370/normal_5ff7c81d5d653.pdfIn PDF document text
    • http://dawexefif.getenjoyment.net/beta_ossidazione_acidi_grassi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408323/normal_5fc7b0a4d4eb2.pdfIn PDF document text
    • http://pixizosusonaxij.sportsontheweb.net/42029337993.pdfIn PDF document text
    • http://fesotisifofil.mygamesonline.org/87976730948.pdfIn PDF document text
    • http://mujoxoluvisukid.getenjoyment.net/sikatadutalu.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/d73a6bb9-24ce-4eaa-adb3-e5f5c8073bd8/wheel_of_time_trailer_super_bowl_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95ff2380-ad4e-4a77-9aab-81289933d5e8/vamabugiwizetatinunezob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/570ef438-8250-439e-9122-957c0be7be7f/how_to_read_nest_energy_history.pdfIn PDF document text
    • http://magegefopo.atwebpages.com/47362661940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ae8edb4-d6fa-4c76-b515-875ff07c64dc/welivufutapu.pdfIn PDF document text
    • http://lipubumili.epizy.com/washington_football_team_helmet_png.pdfIn PDF document text
    • http://bitines.myartsonline.com/40308573633.pdfIn PDF document text
    • http://fujeximadotut.rf.gd/lexington_kentucky_weather_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e6cbdb1-c898-41f4-8035-315bfc0413ba/how_much_does_it_cost_to_change_a_furnace_ignitor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e667b01d-84a3-492c-8af7-e4abc7c6a13e/55742494147.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_off0000ddef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEF 5572 bytes
SHA-256: eff5723faf9899390d30988582dfb8bf8534f5fef1bfb1f6ab099f53d3318e0b
font_01_sfnt_off0000f0c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C5 10456 bytes
SHA-256: 038263d2ecd6cfbe918a5894609c68c9ebd8ccbfa7afab08023ac2837637ccfb
font_02_sfnt_off00011495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11495 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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