Malicious PDF — malware analysis report

Static analysis result for SHA-256 f93332e55e59215b…

MALICIOUS

PDF

74.8 KB Created: 2020-11-24 17:46:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 8b4ad179d36f1d1d199b28f2379b18ff SHA-1: d818747b58230fbdffa2a95654d4e10c76585683 SHA-256: f93332e55e59215b8640fd56d7576146d88f6a655cd1e357d1f245e42c16d099
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating a link farm and an embedded URI pointing to a suspicious domain. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains text related to 'Csgo friendly wallhack command', aligning with the suspicious URL's UTM parameter, suggesting a lure for gamers.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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/strik?utm_term=csgo+friendly+wallhack+command PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470526/normal_5fb992fee02f3.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/vujor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413696/normal_5fa3591ace6c8.pdfIn PDF document text
    • https://lerinaxupol.weebly.com/uploads/1/3/4/6/134662503/3345776.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/c48edb20-2545-418f-8dda-411a8aa4e144/votijak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5a9ddec-3395-448f-ae01-0933f24b5bd4/can_you_sort_google_photos_by_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7224efc-1710-4655-b627-845a45d36411/39351272095.pdfIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/65814766710.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/feff24ff-605b-48e2-9719-b882ea76f30c/jupugutexizetukaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e67a98e7-d2df-4c4e-9ac4-72716d0de7c5/mega_man_costume_toddler.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/825d3b75-fdf7-45e1-a1f6-7c7d73d3dbcf/77975170517.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4916d31d-4231-4ea3-b479-3f0d40c6b960/gowaxepejuzeludixexenotuz.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/94097536019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67d4854c-ece0-4899-a2b6-e00f6f696103/lavemokavuvubogalilida.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_off0000c862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC862 5600 bytes
SHA-256: ed3e15bb66fbde0e5ce4830abe5e70f0b84d8233f108d8826164c5b061dae4dd
font_01_sfnt_off0000db51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB51 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0000e3df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DF 10464 bytes
SHA-256: 83c06812c08bf37463b7cf3df2eb076e659bfb12cc1a69853163cba708a78603
font_03_sfnt_off000107f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F2 16312 bytes
SHA-256: 531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660

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