Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0f90025ebe97896…

MALICIOUS

PDF

117.9 KB Created: 2020-12-26 04:01:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5ea23e12f68c525c636b27c6ddd39c2d SHA-1: 9f4696493160bbd13dc1dc1eacc6805314ee0cad SHA-256: b0f90025ebe978960e93412d1b564833ea5076dfddbc1ae45f6cb96ec1b7f63d
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body appears to be obfuscated or corrupted, but the presence of a malicious redirector URL suggests the primary goal is to direct users to harmful content, likely for phishing or malware distribution.

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://traffmen.ru/123?utm_term=marvel+future+fight+beta+ray+bill+epic+quest+guide In PDF document text
    • https://vopesowe.weebly.com/uploads/1/3/4/6/134638419/b91b4.pdfIn PDF document text
    • https://dakikizubebara.weebly.com/uploads/1/3/4/8/134889455/f543e.pdfIn PDF document text
    • https://safadusuxujex.weebly.com/uploads/1/3/4/3/134319972/2449092.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460677/normal_5fa26e8d961a8.pdfIn PDF document text
    • https://sorimuzumetig.weebly.com/uploads/1/3/4/5/134519591/9496546.pdfIn PDF document text
    • https://nixewoxeb.weebly.com/uploads/1/3/4/3/134354190/fenobetopasaje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411682/normal_5f99e8506d00f.pdfIn PDF document text
    • https://kofemadaki.weebly.com/uploads/1/3/4/6/134675418/6207822.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485001/normal_5fda8e85d5653.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/takateg/37941962017.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/1345338289.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/flipkart_big_billion_days_sale_2019_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tefelaj/mr_popper_s_penguins.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/twist_of_fate_season_2_full.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_off00018345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18345 5852 bytes
SHA-256: d6e91a0d4a87eff46c7cf5755eb26e904bcd7c0a901e20bfb8feacfaf9cda6fd
font_01_sfnt_off00019733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19733 16568 bytes
SHA-256: 4d32a853b3f5381af850365d976d46533c7ac1ae59d3cc0738b4845cf4c43fb7

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