Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9b303621eade96f…

MALICIOUS

PDF

86.6 KB Created: 2020-12-18 16:53:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ddb9842d956aa1b66d20a29e0f797b49 SHA-1: 16aa1fde74140c8d97a2bb1d4ce3f33cd16056fe SHA-256: e9b303621eade96f160e98961b4228c34e227ce6e6a73a45d2a8d05ea444e1fc
214 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of embedded links, forming a link farm, with the primary redirector URL being https://gettraff.ru/123?utm_term=lol+adc+macro+guide. This suggests a phishing or redirection campaign aimed at users who might interact with the document's links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gettraff.ru/123?utm_term=lol+adc+macro+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4498971/normal_5fd3d7dd3f9e7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377114/normal_5fcb512e0391d.pdfIn PDF document text
    • https://gamevuwi.weebly.com/uploads/1/3/4/5/134525912/xerurasewuk_fotumewigo_gunudafasaki_duwawifozerix.pdfIn PDF document text
    • https://fikazimibugexu.weebly.com/uploads/1/3/4/5/134515259/mifuruwapipemaresila.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/af294e59-1180-43d8-82bf-f59da0775e04/bivixazajatusorififipaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88a45e1b-1545-49df-8c4b-ac36d11b6133/thane_of_riften_weapon.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/chief_information_security_officer_duties.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/windscribe_mac_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/formal_way_to_say_bye_in_japanese.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/madcap_flare_project_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3e40f48-9946-4447-8534-1e69ba813165/kay_bee_toys_logopedia.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/betty_edwards_color.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a60cdecd-edfd-478e-9b3b-6f92a77325f1/29138222844.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29448858-b026-4310-a893-7209acb7cfef/counseling_the_culturally_diverse_theory_and_practice_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/406f4d99-40dd-49be-9285-f22ec2d38e1d/north_harris_college.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e822a83-74a3-4ce5-a3a0-adc552e99714/curso_de_electronica_cekit_completo.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_off0001177a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1177A 5020 bytes
SHA-256: f0686d89cc9d25c633473c0d117a189e46a58295eabba333053232fe00e473ca
font_01_sfnt_off00012874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12874 11032 bytes
SHA-256: 1ea1644a568dfb9245c9bcf1702f80a96ae3d63438b0ad0a1aa0148a452a7895

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