Malicious PDF — malware analysis report

Static analysis result for SHA-256 b80564d947f8075e…

MALICIOUS

PDF

75.1 KB Created: 2021-06-11 02:07:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 92738f0dc2ef2a28c24a01d39566e1e2 SHA-1: 2888abba4995b03d5d3373fc53a253112d673583 SHA-256: b80564d947f8075e25e81e155a5c1651b0cb99987b297a675f12b5d88a26b9e4
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crysiq.ru/pbw?utm_term=slugterra+slug+it+out+2+hack+apk+download PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4455669/normal_60b766ef2fd56.pdfIn PDF document text
    • https://nevimemiwuje.weebly.com/uploads/1/3/5/3/135332714/846711.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475739/normal_6039b65090a2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486359/normal_60be8f91c03ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370996/normal_60604bc3e66e9.pdfIn PDF document text
    • https://nasolebad.weebly.com/uploads/1/3/4/6/134695036/wepitigibapexajo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375703/normal_604eddd693997.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499329/normal_604422ac7e7f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366660/normal_60c28c4f3e8bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403560/normal_604cdeffd72ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451021/normal_5fd84f9875c75.pdfIn PDF document text
    • https://xedowekogo.weebly.com/uploads/1/3/4/6/134609622/6953605.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370528/normal_60387278303f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421627/normal_60581d5ea0e00.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4452835/normal_60b69b1757fe4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366645/normal_603d1efa1544c.pdfIn PDF document text
    • https://fowowudajij.weebly.com/uploads/1/3/5/3/135312379/xizadurajonad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451549/normal_60212409e7fae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485450/normal_6046e7e0c4183.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383470/normal_605c1bf29b70f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kuperuxowix.pbworks.com/f/68234354020.pdfIn PDF document text
    • http://jajisaparev.pbworks.com/w/file/fetch/144418632/jivuvajiwupozisotix.pdfIn PDF document text
    • http://muzupusap.pbworks.com/f/23811123215.pdfIn PDF document text
    • http://rezedul.pbworks.com/w/file/fetch/145016466/dafiren.pdfIn PDF document text
    • http://kisagew.pbworks.com/f/98092863958.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_off0000e5e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E1 5728 bytes
SHA-256: e41f597ede2c86a53d96503601ca57ecfb1b14248cf71baeb62014f23a43c950
font_01_sfnt_off0000f96c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96C 10948 bytes
SHA-256: 962e2a55d4c3c22f57d54c9dfcae4d6716f034ee1141c7bb6c25be8c9e09da25