Malicious PDF — malware analysis report

Static analysis result for SHA-256 58d707a79ae316fb…

MALICIOUS

PDF

75.5 KB Created: 2021-01-09 16:17:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 52baf1489a8ffd548e95364ead8dd96a SHA-1: 687b10b467cd101671ad266c4b09f680c4c2078b SHA-256: 58d707a79ae316fb8006bfa43658b673423a0cf25a38b3baf8345e5b478758f0
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a lure for a game hack, directing users to a suspicious URL. Heuristics indicate it's a phishing-related trojan, and ClamAV detection confirms its malicious nature. The document body, though heavily obfuscated, contains references to the lure and the authoring application, suggesting it's designed to trick users into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/123?utm_term=marvel+future+fight+hack+no+survey+no+password PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4409806/normal_5fc3fb3663d84.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379222/normal_5fce9dcd9c44c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470962/normal_5fcff3dbe1405.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421983/normal_5fd3b91d7164c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374536/normal_5f9943b6d1808.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382406/normal_5fc2264b6dfdc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/26d610c4-ec12-404b-b202-823e2e1e44be/pokemon_crystal_breeding_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/fairytale_1_osrs_quick_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38b7c06f-6100-43df-aaab-e254259ddfab/sufidogepunomeruvexadasij.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/nomination_form_sbi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86e50cfd-b109-4525-ab38-d35451a16fb8/13166743950.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/58594156111.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dde5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE5 5620 bytes
SHA-256: 82d0e7fea16c6e0b531b3e984d81ce31263a84bde52ce6ea23554f8d6eac07ac
font_01_sfnt_off0000f123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF123 9792 bytes
SHA-256: ff9463f5672ca13d49e27666e8cbc15e94243157a366949a661a54870c540990
font_02_sfnt_off000112ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112AB 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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