Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc09b9698772052b…

MALICIOUS

PDF

65.3 KB Created: 2020-11-25 18:53:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 88fa22cbcc16bab0ebf759c9d7677cc0 SHA-1: e49d4b2862ea388946ec311fe64acd044e79e80a SHA-256: cc09b9698772052ba0109c5dae66885faaa743fb4707351d8f4a62e3aa0e541f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a significant number of external links, identified as a link farm, suggesting a malicious intent to redirect users. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further supports its malicious nature. While no scripts were directly extracted, the PDF structure and embedded URIs indicate a phishing or malicious redirection attempt, likely delivered as a spearphishing attachment.

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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=android+hack+for+my+singing+monsters PDF link annotation
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/sesanajaxovu-pubawonig.pdfIn PDF document text
    • https://navojinalano.weebly.com/uploads/1/3/4/7/134755450/vulelesif-xewaxo-fexik-fotelijupokala.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/bde38796-dd03-47eb-9c11-a72560a8413f/44167864005.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61910bc0-b3eb-43e0-a1e2-470a3b1c5a81/92676741803.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b032b80-f138-4870-b6f0-9d9fc57fd7ed/8289200217.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/satole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfb2b665-fda1-4094-9305-d1bcfee1b57a/xetubevufilorosaketasun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba6d19d5-18aa-4662-865a-8645b2dc5644/58657861929.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97486446-63cb-48ae-a006-52a6309c835f/62644113031.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f85753c-7690-4b4d-a8af-676c9e75ad83/fta_satellite_receiver_and_dish.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28789c1b-00f4-4629-9c47-98a66494a319/gosetoxekusewoxujova.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_off0000c206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC206 5556 bytes
SHA-256: 80ed7988a38e7d2e2fb8b5838f7204ad0617b5878265e6be7462c951ffb2441a
font_01_sfnt_off0000d4d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D2 10484 bytes
SHA-256: 750607ae69a60eafe9eb7b967ae707bd9be813aa7d1b68857eefb0b0ce5d393e

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