Malicious PDF — malware analysis report

Static analysis result for SHA-256 046748f933bdd6f8…

MALICIOUS

PDF

75.8 KB Created: 2021-02-22 14:12:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a7f7a96b60f8c2dac43820f67aa271c5 SHA-1: 5af51cad55ea66b53dcbe7896d9bd8d7b10fd876 SHA-256: 046748f933bdd6f8e32eae20ef617b04fbb1194f8cf8620d3eb827220af62a5b
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme designed to lead users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to 'John Deere LT160 parts lookup'. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://druttle.ru/strik?utm_term=john+deere+lt160+parts+lookup PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4483602/normal_5ff186a5dc45a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409628/normal_5fdbc0becc435.pdfIn PDF document text
    • http://guwugil.22web.org/60088917790.pdfIn PDF document text
    • https://bufigolumixi.weebly.com/uploads/1/3/4/2/134234787/4a7c11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381321/normal_60251992eb113.pdfIn PDF document text
    • https://wepeweguwerixum.weebly.com/uploads/1/3/1/8/131856135/fuwinef-nexikanu-nipaxunew.pdfIn PDF document text
    • https://kemumapuvepuvi.weebly.com/uploads/1/3/4/3/134311950/15c4b32119d.pdfIn PDF document text
    • https://xoxomupufolud.weebly.com/uploads/1/3/0/9/130969418/zozumawome_nedelisubum_xegif.pdfIn PDF document text
    • https://babipuwoze.weebly.com/uploads/1/3/4/8/134865032/nenetonete-posomokul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424683/normal_600785f04fb9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365542/normal_601e644335997.pdfIn PDF document text
    • http://wukosuwusa.iblogger.org/alchemist_leveling_guide_ragnarok_mobile.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373517/normal_5fdad39c0400f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kewugozosefo.epizy.com/astrill_for_ios.pdfIn PDF document text
    • http://gudanomakorake.epizy.com/22142122726.pdfIn PDF document text
    • http://nogojituwizax.epizy.com/95462396123.pdfIn PDF document text
    • http://bulufuw.rf.gd/how_to_wrap_gifts_in_a_box.pdfIn PDF document text
    • http://wiwekunu.rf.gd/67521689266.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_off0000e980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE980 5448 bytes
SHA-256: 9a36898b4b5ad0de6396f54d849839c45774fd1ec7534bd8118df838899b2577
font_01_sfnt_off0000fbf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF8 11104 bytes
SHA-256: d9c684df018eb2bb6165c727f3136acc94dee561965d4c75ae84a319784732d1

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