Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2928bab3c17877d…

MALICIOUS

PDF

77.1 KB Created: 2021-03-16 13:11:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d879aba6d3fe95e440f3fc1f699b77f8 SHA-1: abf61986ec2e872dcb4b0cf44af177650d88d298 SHA-256: e2928bab3c17877d2ad88ce3183ec054e1e75b4e58c9296941be2cf08ba5794d
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically referencing 'award' and a keyword search term, suggesting a phishing or scam lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for numerous links, further supporting a malicious intent. ClamAV detection as 'Pdf.Phishing.Trojan' confirms the malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/award?keyword=volume+of+geometric+shapes+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4383795/normal_6000a0851d066.pdfIn PDF document text
    • http://hdsamara.ru/why_he_disappears_then_comes_backe9f58.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371248/normal_5ffbee8b878f5.pdfIn PDF document text
    • http://huaweistoreukr.xyz/public_speaking_for_college_and_career_11th_edition_ebook90br4.pdfIn PDF document text
    • http://rasipafus.getenjoyment.net/lupozad.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/ukjiYhd/70905281247.pdfIn PDF document text
    • http://mkuu.club/zabivelerisusejofiliweluti5wb.pdfIn PDF document text
    • https://cdn.sqhk.co/govazilose/lXW9HcV/google_spreadsheet_importrange_and_query.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465557/normal_5fc7acc5273e2.pdfIn PDF document text
    • http://alluniversity.fun/834202319197esn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456686/normal_602cdaeeeb3c4.pdfIn PDF document text
    • http://yandex-dostav.ru/90835760765hk05s.pdfIn PDF document text
    • http://in-step.shop/jorolefowerogixegkbi9d.pdfIn PDF document text
    • http://gk-kuban.ru/how_to_fix_sanyo_tv0apuc.pdfIn PDF document text
    • https://cdn.sqhk.co/wawabosamugo/aRicgdL/roredulasewarapojo.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/1bce09d6-8067-4238-afcc-9d5ae137a9b5/fejogomapiridajoso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21161d42-c84a-4812-b5ef-afea51e48fb5/under_the_dome_full_movie_tamil_dubbed_watch_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f79723d-3925-4293-bcd5-86739610d57b/zojazakoruwigudi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a0996d5-66c2-4b62-b2b0-38fd30983b3d/is_free_parking_in_monopoly.pdfIn PDF document text
    • http://faxiruvud.myartsonline.com/23949209958.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bd22fe1-9f63-4dde-9377-4fbcb893038c/puvoku.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF7 5532 bytes
SHA-256: d660581f0eb1e0649c980d8d05efc36d284a073df0dcdf780d767f87297ec571
font_01_sfnt_off000101a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A8 10904 bytes
SHA-256: 35ae6a5d72cc1587a955e7d7e716b561b68a6a72e2d0bd9dab21f93981f5e494

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