Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e0668e5bc7f5a0e…

MALICIOUS

PDF

83.2 KB Created: 2020-11-09 18:16:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: e893802e566695be9826bb45bc247cd0 SHA-1: da3211bbcb9040a6673020331907f32db11bcdf3 SHA-256: 0e0668e5bc7f5a0e819f8e61b3e0961454f781d33bf246d0bcef14d0d30ff916
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 0.9995

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://traffset.ru/aws?keyword=coin+master+free+25+spin+link PDF link annotation
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/1548212.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/tagorarib/norton_reader_14th_edition_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wifozuxeku/black_diamonds_wow_classic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfc1d45e-1c3b-4f2a-b84b-0f955cb42545/schmidt_boots_warranty.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/mega_man_unblocked_g4mes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acfdfdcd-f1cd-4c6e-a710-1df3233bda58/93945504860.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/xitamopaxoxivovexazutixib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16f35b23-2c1a-4341-b703-a347078d1a3c/54981911197.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/fundamentals_of_deep_learning_buduma.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/45th_wedding_anniversary_symbolism.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/pokemon_air_slash_move.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B6 5272 bytes
SHA-256: 0ea3743a82048ab128897b5a83402daffc3a357ea81f00f7b5597a4d3bb8e2fc
font_01_sfnt_off0000f58a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58A 11188 bytes
SHA-256: 32f670dc7391fda27ad7e17a4c22d97da64516e1a0ae3a968ffc7c2d94fcd567
font_02_sfnt_off00011bbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BBE 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848
font_03_sfnt_off000130c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130C2 3804 bytes
SHA-256: 14801ec9927bb8f7c345e7ce5fb26515d73d013418b5fc7d371ec4828ed5cd91

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