Malicious PDF — malware analysis report

Static analysis result for SHA-256 f32f659d2c24573e…

MALICIOUS

PDF

71.1 KB Created: 2020-11-11 19:39:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 28469b70193f7d66547afa63d00640fd SHA-1: b823f4622ca59b3e915f69c993bfd42ab84efc1b SHA-256: f32f659d2c24573e2fb472a519216a96464461b279e6b535c84dec79eb61f1bd
214 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with at least two identified as part of a link farm designed to redirect users to malicious infrastructure. One critical heuristic specifically flagged a link to known malicious redirector infrastructure. While no scripts were directly extracted, the PDF structure and heuristics strongly suggest a phishing or malware distribution attempt via malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ggtraff.ru/123?utm_term=blueberry+boy+bait+atk In PDF document text
    • https://kavixonew.weebly.com/uploads/1/3/4/5/134592395/tudekeruxujuga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377704/normal_5f8cbdfd1f4a3.pdfIn PDF document text
    • https://jojavofeze.weebly.com/uploads/1/3/4/3/134395471/tiwezozu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369143/normal_5f91f6078dcc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373755/normal_5f9c43f58fa26.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/figugipopar/tebonizusujogazix.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/68377377506.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4587a19-5e70-4939-a7f5-21a0e43a139b/meluravuvasufuxamevexalu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bd810fd-8719-4215-b46d-2ba4745c11bc/86311745776.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/assimilation_and_accommodation_piaget.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd69d89c-a41d-470c-86ae-7d608cb1d0d5/pexidikukigupuvazusudux.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/acceleration_worksheet_answers_physics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cc60a3d-06a8-4063-89c8-f8eac003b1dc/86897927096.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_off0000db58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB58 4856 bytes
SHA-256: 66064fc0f745193cf572b88ff12bb61a3430b5bbfc4c07fd7b2bb860df29a6dd
font_01_sfnt_off0000ebf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF9 10352 bytes
SHA-256: 2446a9f6f46019a9ab966bf2f65a78f6edb8e4a0505094ae7f54b9841f551443

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