Malicious PDF — malware analysis report

Static analysis result for SHA-256 89634c323ac81f40…

MALICIOUS

PDF

72.9 KB Created: 2020-11-26 08:08:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a706c46738c2c235c08cd746b6e71d4e SHA-1: 2d5dc8d94f36d246c3c46ebff9a3deac970e0842 SHA-256: 89634c323ac81f40175e1a5e20e6250581c6b6e126325a21f7400f3c69f0eb94
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URL that leads to a phishing site, disguised as a list of names. The PDF structure itself is also flagged for duplicate object bodies, indicating potential obfuscation or malformation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafficel.ru/123?utm_term=bulgarian+names+female PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374532/normal_5f924e40018b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497688/normal_5fbc567bb4d0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453102/normal_5fa2cd6072982.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404755/normal_5f9526ca00a2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388062/normal_5f9818684a4be.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/voxulija/2014_camaro_ss_manual_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/decatur_county_schools_facebook.pdfIn PDF document text
    • https://s3.amazonaws.com/wisatutadi/tennis_game_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/jovadimofowasajozo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35a31706-cc6a-42ca-82be-9607bcf010bb/76075725851.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/wudidu.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/94795426519.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/zojesenazakivesed.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/garmin_nuvi_265w_usb_cable.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/zokudetosizuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e28877e9-16db-4ad8-83b5-d8029776b6af/spring_lake_park_high_school_address.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_off0000e1e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E8 5136 bytes
SHA-256: 2c34287965d8d4c294efbd9064fb23bdf2984386f774e4e16ff4d9178d565558
font_01_sfnt_off0000f34b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34B 10528 bytes
SHA-256: 52c3e9b373d64d0910ed26b461f15cad6b3ed98b51cc02f379bf079cad20d59a

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