Malicious PDF — malware analysis report

Static analysis result for SHA-256 e77721bbda676946…

MALICIOUS

PDF

67.5 KB Created: 2020-11-10 12:43:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 199f530508c10591cc2473a6cee412d4 SHA-1: 5ea4a67b78d82168856ccfe2a528faabf65eb768 SHA-256: e77721bbda676946c86b37bac319f61a4679c2adc226960cf242493f51d5af84
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains an embedded URI pointing to 'https://trafftec.ru/123?keyword=my+boy+emulator+apk', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, appears to contain keywords related to emulators and application downloads, suggesting a lure for potentially unwanted or malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/123?keyword=my+boy+emulator+apk
    • https://cdn-cms.f-static.net/uploads/4369305/normal_5f9e51b32d6f8.pdf
    • https://cdn-cms.f-static.net/uploads/4375503/normal_5f8a00aff3c5a.pdf
    • https://cdn-cms.f-static.net/uploads/4422390/normal_5f9b77c5a14f5.pdf
    • https://cdn-cms.f-static.net/uploads/4382196/normal_5f960e9d9fa2a.pdf
    • https://cdn-cms.f-static.net/uploads/4417139/normal_5f989765bf6fb.pdf
    • https://cdn-cms.f-static.net/uploads/4385427/normal_5f8efcd034169.pdf
    • https://cdn-cms.f-static.net/uploads/4419642/normal_5fa64bbb50a35.pdf
    • https://cdn-cms.f-static.net/uploads/4471099/normal_5fa7f7729bdaf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/simujix/2016_rav4_se_owners_manual.pdf
    • https://uploads.strikinglycdn.com/files/e9bafbfd-b22d-4ac5-9065-56792e3770ea/73630263582.pdf
    • https://s3.amazonaws.com/vezumobigodub/chicco_pack_and_play_with_changing_table.pdf
    • https://uploads.strikinglycdn.com/files/03d4caaf-2322-4516-9225-85774152988f/chrome_browser_apk_for_fire_tablet.pdf
    • https://uploads.strikinglycdn.com/files/af29df0d-8d44-4d5c-bec8-4721d4b8698d/bezusobomujoruxerilaxefof.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cad6.bin
ccd749354020374ad5c8e821ead79d5e31061d581889263fd1d289b473c9eb71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCAD6 5100 bytes
font_01_sfnt_off0000dc29.bin
5a0de7e95d0c5784ba071f195f7b2dbf216412ee7aa0ee0ed4f7e69648f7f2a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC29 10440 bytes

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