Malicious PDF — malware analysis report

Static analysis result for SHA-256 10e93cf2982cf696…

MALICIOUS

PDF

58.6 KB Created: 2021-02-03 00:32:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: fc0066b3751317e6e0349d82e780e646 SHA-1: 5232075ada4799ccc37befde8824fb9d686792a7 SHA-256: 10e93cf2982cf696d55940b13db9c299a6b3ca14286910f293fd17c08211f074
184 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attempt to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8253

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.
  • 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
  • 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://crophysi.ru/aws?utm_term=carte+du+monde+%25C3%25A0+imprimer+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366343/normal_5fe8e4751de73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402507/normal_5fdb345648a55.pdfIn PDF document text
    • https://vigobekopu.weebly.com/uploads/1/3/2/3/132302998/fivuxeride.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454306/normal_5ffdc8ee071b8.pdfIn PDF document text
    • http://vnds-v.website/57471597654axl69.pdfIn PDF document text
    • https://kafiwixuvaso.weebly.com/uploads/1/3/0/8/130874495/c09a23df98.pdfIn PDF document text
    • https://fudesatalaponu.weebly.com/uploads/1/3/2/7/132710537/fejatukobevipe-bonema.pdfIn PDF document text
    • http://ledy66.net/ruwetv4d3z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487888/normal_60104a5378385.pdfIn PDF document text
    • https://wimukevefom.weebly.com/uploads/1/3/0/7/130739067/wugin.pdfIn PDF document text
    • http://fotonagosuslugi-01.space/47290673066tc49m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373779/normal_6019d18bc33ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417999/normal_5fdfd290759ee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384167/normal_6005f3168e12f.pdfIn PDF document text
    • http://djami.ru/comparatives_and_superlatives_of_adjectivesnkg04.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/xopugup/kikemepimuxepu.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d21f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD21F 5116 bytes
SHA-256: 403e39c07650fc1a6c6b7218c0c4add105dcbff9221ee9dc1fc9c412bd388343