Malicious PDF — malware analysis report

Static analysis result for SHA-256 7849b90f52f1c57c…

MALICIOUS

PDF

58.2 KB Created: 2020-11-18 22:33:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: b1627d04dce5a2c391ab46a6f5d1e263 SHA-1: 9b804165d3d505587d0e650f15fb7769bcc4e745 SHA-256: 7849b90f52f1c57ca6fe91f6716903261f4d5b91192d0afa7850ad9457b935b6
244 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, containing a large number of embedded links. Several of these links point to known malicious redirector infrastructure or are part of a link farm hosted on disposable domains, suggesting a phishing or SEO manipulation campaign. The document body contains obfuscated text and metadata related to its creation, but no explicit script content was extracted.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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.
  • 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://traffine.ru/123?utm_term=fantasy+costco+mug In PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/zebapesuluboxaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481841/normal_5fae33f5841c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449406/normal_5f9eb6b93fb95.pdfIn PDF document text
    • https://sasakafu.weebly.com/uploads/1/3/4/3/134371045/puxoburaxakapewefo.pdfIn PDF document text
    • https://kirorasonosa.weebly.com/uploads/1/3/4/7/134743937/gidevuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367311/normal_5f94b13d47a89.pdfIn PDF document text
    • https://miboxijudowisu.weebly.com/uploads/1/3/4/4/134491333/lesalevivufarixe.pdfIn PDF document text
    • https://ferateritilew.weebly.com/uploads/1/3/4/2/134265971/zugenub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375700/normal_5f8a1c51d8d40.pdfIn PDF document text
    • https://kupanonul.weebly.com/uploads/1/3/4/6/134682697/duvijodetan.pdfIn PDF document text
    • https://dajurejew.weebly.com/uploads/1/3/4/7/134753869/nunuronaganorikewoj.pdfIn PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/7628721.pdfIn PDF document text
    • https://xodetawutal.weebly.com/uploads/1/3/0/7/130774968/01fe15f0ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393637/normal_5f93d00e37c54.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/33213f34-a157-432f-b94a-324a3b935854/22551019083.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_off0000ab6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB6F 5048 bytes
SHA-256: ea8257473ca72c6eec983a8e0d51fb2cd0cc69bb21280f9ab9de685674827351
font_01_sfnt_off0000bc9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC9F 9204 bytes
SHA-256: 5cc44c9c7c9fe2d1743abb6337bfb93847c5ad8207056367c69ccad6ec805a50

Open this report in the interactive analyzer, or submit your own file for analysis.