Malicious PDF — malware analysis report

Static analysis result for SHA-256 052eb05840d46825…

MALICIOUS

PDF

107.4 KB Created: 2020-11-16 20:02:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: defbe11a598dc5d409476681202f42c0 SHA-1: 195d109e52b6c0797b8805894d50e49e0b309e30 SHA-256: 052eb05840d468255d9f3638c737b75079e84a18871f2a1781fee181c3d7443f
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on Weebly, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs point to suspicious domains, and the document body's metadata suggests it was generated by wkhtmltopdf, often used to create PDFs from web content, which could be part of a larger phishing or spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://trafffi.ru/123?utm_term=latar+belakang+seo+ye+ji PDF link annotation
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/liwefazawuzalal-dewatezata-wetezovefo-zimejiwu.pdfIn PDF document text
    • https://rovemijiv.weebly.com/uploads/1/3/4/3/134343091/ledelikuxodezuzim.pdfIn PDF document text
    • https://gupaxapofigovi.weebly.com/uploads/1/3/4/3/134356466/bagibejotop_rojusozu_lixumimo.pdfIn PDF document text
    • https://furifusopuwebe.weebly.com/uploads/1/3/4/4/134471692/c490cd1343457.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466173/normal_5fa33f4489dda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369911/normal_5fa58fb7ae5e7.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/fulazelof/dark_souls_3_walkthrough.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/jill_de_jong_md.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/sitixowabudulafageg.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/madanarizogalukuk.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/manual_for_singer_simple_2263.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/fowijufetiposukof.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/bearing_types_and_applications.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010fcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FCB 22084 bytes
SHA-256: ca056ea2771f4a94a23985cd6b28cc220264a3e75d17b17901ca779bcab4e34b
font_01_sfnt_off000150aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150AA 5176 bytes
SHA-256: c93e07022274b8d19b0e7e0994e125577d7f6940aeb92c1a3c52ef5e0aeff91b
font_02_sfnt_off00016267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16267 12604 bytes
SHA-256: 912c2b573513af768591fa148bc7686156579b14bcb1b27b86e8f88ea8ac49d3
font_03_sfnt_off00018b28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B28 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67

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