Malicious PDF — malware analysis report

Static analysis result for SHA-256 470b818b8cf149ff…

MALICIOUS

PDF

67.3 KB Created: 2020-12-05 17:42:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ddb39ec624d9ea72c655c4397835d502 SHA-1: aec4ff59d8731431f52a69df4caa7b453912b680 SHA-256: 470b818b8cf149ffefaca2102db2f4b8c66719b7f7ff067a738a87fdd70d6ff7
214 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, identified as a link farm, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or SEO manipulation to drive traffic to malicious sites. No scripts were extracted, but the presence of numerous external links suggests the primary goal is to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=catalog+poem+definition In PDF document text
    • https://kulufitobapesad.weebly.com/uploads/1/3/4/4/134443603/b30e0b9f361.pdfIn PDF document text
    • https://koxamuru.weebly.com/uploads/1/3/4/8/134890845/9b4d63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378599/normal_5fb5e5f9c126e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385633/normal_5f9226a9d6298.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374376/normal_5f9e4493c4072.pdfIn PDF document text
    • https://tunizedudozep.weebly.com/uploads/1/3/4/5/134589181/7251000.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408701/normal_5faee452be7c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403819/normal_5f99e59d350b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422135/normal_5f9ba1871f12f.pdfIn PDF document text
    • https://donedujawag.weebly.com/uploads/1/3/4/3/134315137/9c15ec7e545.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408479/normal_5faf17d707a6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368467/normal_5f971a93d52e1.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/padadutiseni/faxibul.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/68889557021.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_off0000cdf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF2 4992 bytes
SHA-256: 3a5fdc76d5bc1cd3ab231e5cde2f54fa01756c72df761dd85aadac0785c2bb99
font_01_sfnt_off0000dedc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDC 9820 bytes
SHA-256: 1c0ab45a5e071aea3c799ee5f5e5219304a13a487ffeb8039503afe3092bb97e

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