Malicious PDF — malware analysis report

Static analysis result for SHA-256 966daf532c426ff1…

MALICIOUS

PDF

60.2 KB Created: 2020-12-07 03:00:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 0bbc4d3d9dd90685da18865d07bad422 SHA-1: d2eaadeaee21dc6d071700fb8c943095209d5b6f SHA-256: 966daf532c426ff150f22c22f5a9587f071c69bc97358636dd881d55e94dfd12
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 0.9996

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://trafffe.ru/strik?utm_term=honda+eu2000i+owner%2527s+repair+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374535/normal_5f90ed7df3cfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f87408f4aac2.pdfIn PDF document text
    • https://jiresuzava.weebly.com/uploads/1/3/4/7/134706808/4dceb6.pdfIn PDF document text
    • https://zewiloda.weebly.com/uploads/1/3/4/6/134655603/93a2659775ff.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/dc6aa572-a304-4dd2-a53d-fb13145c3e79/50809067945.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7236c639-c43d-4fc4-bb5c-e69ca1dba8ae/kipis.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5cb392e537a05ef2a8f72/t/5fcb810b64036b61438e8149/1607172363748/stickers_su_iphone.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf5083fdc31513a0ee891/1606219017344/what_does_it_mean_to_lost_hope_in_mankind.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ece0fda4-59fe-4b0e-8173-d924e8aa8c64/guvugasukanorabidab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ab785a1-5c6a-4e95-a344-74d75bc953e2/aptoide_tv_latest_version_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/145d54b4-a1ef-4a03-aa6a-877c768ad9d7/41061523637.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/34052888301.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40dec421-c649-46ff-a031-a339fcb20e3a/stunt_cars_3_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dce312eb-50db-4a4f-82f8-7d6083a967c6/all_fortnite_letters_in_loading_screens.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/disowipesivurodaloj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6160cf8f-d1c9-411a-9e70-06cb1dda81a2/80291434540.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_off0000b0c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0C7 5464 bytes
SHA-256: 13bbe667028258f0772182c6d847f9c703314cb24a77a992f586bf5432ef947d
font_01_sfnt_off0000c359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC359 9496 bytes
SHA-256: e6cc104e87c8bcd0632fc38687c067d67878d5e7e5aa1f8d96d8fda65fe9408f

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