Malicious PDF — malware analysis report

Static analysis result for SHA-256 651bc25d3204d821…

MALICIOUS

PDF

94.4 KB Created: 2021-01-02 11:43:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: bc8f82fb60a3b39913945443a4cfab7b SHA-1: d2c9c8d07824f8541be0fbc2ea2d3b330cd859c8 SHA-256: 651bc25d3204d8211bea576a9679a0fc18416e4593b08f1e644a2c62fd3816c2
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, suggests a lure related to a video game guide, likely intended to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffine.ru/aws?utm_term=kirby+64+crystal+shards+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368469/normal_5fab8342cdeb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383475/normal_5fa6d131e61aa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426549/normal_5fc559b5cf34e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386347/normal_5febc0390bbaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476751/normal_5fe86bf26b827.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/6a155ac1-8d20-40ec-bb88-e9c98ba3ea68/rumadabifaxelelajalijise.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/dagovoluvapaligotipux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfee8198-9e05-4fe7-8f41-1f4eb6207136/95862722639.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc6a28ba-d405-450b-ad14-dfd48df8a901/6523686628.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca61a1cd-82fa-49a7-9441-d99bf9cf93eb/gofogamujikuwapotipulofi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d522225-e178-4b14-9201-4103ddc8a971/wopenegukewawe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b61c7301-ff62-42fe-975b-af36bb4bd208/83285225112.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aabcf9b4-493d-4f2f-8c05-5d7c481d7f28/sopokogawojewur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/910d8510-c118-46dd-9460-512e0010b814/76827787952.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_off0000ffa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA5 6120 bytes
SHA-256: 8bcdc9d5f773be8a9a97a0bee5138a7adbbaf3f85d74266d56b9585c4172a295
font_01_sfnt_off000114e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E5 5656 bytes
SHA-256: 12d471499aed02b658a26953ff23fe3beb478bd0f8c042753190b3e2ed953a5a
font_02_sfnt_off00012835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12835 11916 bytes
SHA-256: 856599f797adcdcac06f92257cd7daf11884adc7de8f57488ee389ea0d0d05f9
font_03_sfnt_off00014fb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FB3 17580 bytes
SHA-256: 4248529dc97144e9e9fa3136f73d5a0eb39f2d36e61457cf73bac0e5ef6b3ed0

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