Malicious PDF — malware analysis report

Static analysis result for SHA-256 3084d8fbe32b9969…

MALICIOUS

PDF

78.8 KB Created: 2021-05-31 05:52:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e295e981714e41ac22c5f5519a2dedc8 SHA-1: 6be9ab54c379eaf1ddebf2a61bc0ec9f89294cce SHA-256: 3084d8fbe32b9969005b2de9381a19648bd7c1dcd355dccb88e0efd0e4571d8b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9992

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://gimoguvi.ru/123?utm_term=movies++tamilrockers+2018 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415936/normal_6025f9ae9f8d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424935/normal_5ffdf5bf44684.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497356/normal_60392c98ec634.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418370/normal_600801c66a019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389830/normal_60213eef50e26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452621/normal_603256ca68b30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470685/normal_6032065330024.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485926/normal_600befa3f344d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409997/normal_604189ff205bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488810/normal_606ab99a615ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449178/normal_6023666d875eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415068/normal_601dce30808bf.pdfIn PDF document text
    • https://rilitovewub.weebly.com/uploads/1/3/4/0/134095842/e01728f2.pdfIn PDF document text
    • https://nulobivamil.weebly.com/uploads/1/3/4/3/134374027/fotofa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448992/normal_600f7911e3db6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457582/normal_60660a356623c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446507/normal_5fca693ead519.pdfIn PDF document text
    • https://novenoberube.weebly.com/uploads/1/3/0/7/130776641/4656749.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500450/normal_60605bf6d7549.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366362/normal_5fcb49881beb4.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/969e121b-9792-4b05-92ca-28bbf57a2c02/56440389714.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d45ea55-066d-4f12-9b1a-b44c378a794e/90400037987.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afd9e377-ee82-4cef-b1ce-094992edbd04/42901015669.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_off0000f4e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E6 5596 bytes
SHA-256: e025245ff11f56fca82c04e9687c1b3c83ac987f5b7dab9ddbe91be6cfeae384
font_01_sfnt_off000107e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E9 11020 bytes
SHA-256: c8069dde3f5f2678e840bb772a6ef90a93870ff0f06a3aeb7c70a9f8dd748989

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