Malicious PDF — malware analysis report

Static analysis result for SHA-256 d15f7a0ecbdef6a0…

MALICIOUS

PDF

72.1 KB Created: 2020-12-22 07:22:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d1a0bbb9ada05aa2cdfdc9ad00ad6eca SHA-1: 9d5158efa1d541894658e2f6f80eaafaae5ca688 SHA-256: d15f7a0ecbdef6a0f3aae05b54d1232efb4d296ebac816b69d6ee6d641c463ae
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL that directs users to a suspicious domain, likely for credential harvesting or malware distribution. The document body, though heavily obfuscated, appears to contain keywords related to advertising, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffe.ru/123?utm_term=8mm+film+scanner PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388048/normal_5f96e274b7173.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415739/normal_5fa7882c5a993.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494669/normal_5fb56cdebc4dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485926/normal_5fd113d5c9bb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374953/normal_5f8c3a556b3ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381543/normal_5fc016c7226ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462368/normal_5fa425b685842.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408707/normal_5f9e8bed640a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459025/normal_5fb6a6efba030.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366377/normal_5f886a577c158.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/290aaee4-baba-49ee-9557-d7bd02bfe168/dubinagozagumalujixamumaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1451b7ce-4b1e-427b-92df-7f554ff2be08/80473750390.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/701aa9b6-cc05-4bdb-a7d1-8d15beb35274/24425180992.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc478c85-71af-458a-89b9-e4647cec9b00/walking_dead_season_1_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cec56c9c-2c7f-4593-9514-8b9a8e0ce172/el_hombre_ms_rico_de_babilonia_libr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/349320dd-e99c-4419-b004-6f21853fe279/economics_today_the_micro_view_19th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb21dcfe-5300-4df9-b3b5-9e97515c2cb0/79555981567.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_off0000cfc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFC5 5124 bytes
SHA-256: 2e94cf214394bd2ded2f3080e0c2b21a6c06c146f28ea276b93fb3aa7c3a668d
font_01_sfnt_off0000e11c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE11C 16472 bytes
SHA-256: 26dbdb2a6d6fb03e10ac22baed8b379eb655cae69be2af714afd166e215e7c77

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