Malicious PDF — malware analysis report

Static analysis result for SHA-256 9650d803cc3ede8f…

MALICIOUS

PDF

75.2 KB Created: 2020-11-22 04:02:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 559b92f080106afb4363872798e85d91 SHA-1: 4e5d6179cef2174112a5ffe0bd1dd433d71cd9d6 SHA-256: 9650d803cc3ede8f333141de84c56832d2729d58af1905a8a94c6a7273051989
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with at least one identified as a malicious redirector. The heuristic firings indicate the PDF is designed to link to external malicious content, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly support its 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
  • 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=feedback+sports+bike+stand+vs+park+tool In PDF document text
    • https://tuxonojetivap.weebly.com/uploads/1/3/4/4/134437157/2a079325b14ded.pdfIn PDF document text
    • https://buveziketi.weebly.com/uploads/1/3/1/3/131398526/tajefizuzifojomawo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476135/normal_5fb878061d7d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425784/normal_5fa346450963e.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/liguwodosimefet-fexamadora-fomubidotoje-buzeraxif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5f88786f2ba64.pdfIn PDF document text
    • https://zuragani.weebly.com/uploads/1/3/1/4/131438510/tavugaxawugu_kamakapexu.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/ab60a9fa-2fa0-405d-bb45-cb5b3df20061/big_paintball_aimbot_hack_pastebin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02128f0f-bd98-4c75-bd95-6a1048010b67/download_i_took_a_pill_in_ibiza_mp3.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/word_biblical_commentary_genesis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e73f552-d9b0-42a2-992e-b39576c48938/87135394358.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee9b1e29-069d-4b35-809f-2128ac94a908/shallow_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/poviduvudirav.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_off0000dda5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA5 5076 bytes
SHA-256: 1b5759e4d47b7b5c36c98c1789f8355ff45d57a87457a746f09e0727d2e86e1f
font_01_sfnt_off0000eef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF0 10292 bytes
SHA-256: fb2e9b28f936394b1301d5333848b8420b26d83dc6fea41fc4864c21feb8cbd8
font_02_sfnt_off000111e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E8 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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