Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f7eb2bf97217e38…

MALICIOUS

PDF

76.6 KB Created: 2020-12-16 03:08:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 37267428237c834993187c2a22e441b5 SHA-1: 3c1ca7784c7a88e7b7ef095eb5f2fea719a61a6f SHA-256: 6f7eb2bf97217e3839e151f8bc9d19e638bf91dc085d065d64b1d787b045bc7f
222 Risk Score

Malware Insights

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

The PDF contains multiple links to external resources, with at least one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of outbound links, suggesting a tactic to distribute malicious content or engage in SEO manipulation for phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffking.ru/123?utm_term=gotranscript+test+answers+pdf+august+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383334/normal_5f8d3734b55bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366952/normal_5f9c161fc5b78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421336/normal_5fd1c2b89a596.pdfIn PDF document text
    • https://fakazurirogedim.weebly.com/uploads/1/3/4/7/134743668/sixuxusu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386349/normal_5f8ce92f63d4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365638/normal_5fb267fbf0079.pdfIn PDF document text
    • https://sopoxovolofu.weebly.com/uploads/1/3/4/5/134509961/gibabujux-notusabo-dizoxukazo-tavilowo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369664/normal_5fafa8d859c83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467318/normal_5fa9b2f944ff2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378599/normal_5f8d5c739c0b4.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/f895e413-d588-4786-9c73-4fc96f67c924/72706956518.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/354e8f59-0a3f-4ea6-b3f0-3076ba6a4b32/scientific_methods_worksheet_1_graphing_practice_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5d8aa2d-66b0-4a61-9671-83a275397457/77750248757.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D8 5688 bytes
SHA-256: 847633efad8734b1fa457306c6e11aabee00e60bbc5c327981f46fc0610c7545
font_01_sfnt_off0000e862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE862 11244 bytes
SHA-256: 3720c95a3c56fd5f4c08b755f88b0f22feb1d3f69525c5beea88aa2694c96175
font_02_sfnt_off00010f2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2E 16300 bytes
SHA-256: e4fbeb38030c3769964c1a5951c533a55f21893d08e7f16e9b1af1c698f23ca6

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