Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cffc2dee669d99b…

MALICIOUS

PDF

61.6 KB Created: 2020-11-14 02:16:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 335ac7a55e173d11c98e32e1eaa03b0c SHA-1: 907d7ab4120bcf843fcff4a8f27eeca1b76f6c05 SHA-256: 3cffc2dee669d99b67119b56c7f446fcfa4501ce07e100785772ea3c68e01bfa
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://ggtraff.ru/aws?utm_term=fortnightly+budget+spreadsheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371799/normal_5f9e849138999.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366395/normal_5f8b13142bc8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460686/normal_5fa8c0a38a56a.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/684b2c66-96a7-442c-bffb-ac7197a31a1f/moborajawog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8771a3f8-2eaa-413c-bf7c-ff09499f78f3/dsc_4020_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae8e4fdd-12f6-46e0-b889-441721a3d39e/1541249948.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6514e1c9-a5a0-474d-8ccf-8eac7f9446da/xapakukulesagesifupim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20344ba2-7a02-41fc-a2b9-6ce79adca3b2/draw-tite_activator_ii_wiring_diagra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/665b839f-f188-4d4b-bb1c-4174dbc7a276/75249557097.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/speech_on_kashmir_in_urdu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ed8d811-420e-4f3b-9ce3-984167d30bdd/field_engineer_salary_turner_construction.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/xiwusit.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_off0000b552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB552 5420 bytes
SHA-256: 44bb61e4e41fe55991cc32ca8f6824b132cf2e85f20af94b5d7a5d65592d8948
font_01_sfnt_off0000c7b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7B8 10084 bytes
SHA-256: 1d1b11158201341fc14a2e8169207117f5163f848809498c613bc9a95bc809f7

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