Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d9971695af646ba…

MALICIOUS

PDF

71.1 KB Created: 2020-12-17 00:53:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ce5d2bad814af0a613ec9a699ad56885 SHA-1: d271ad533515f70a3a33c532414ff0c535ccf9f1 SHA-256: 9d9971695af646baf29948d55a6a3870f9d1e1aa8112d6e9d9b319c988c6d422
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to lure the user into clicking it. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'dynamic anatomy pdf'. No scripts were extracted, but the presence of an external URI suggests a phishing attempt.

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://trafficel.ru/123?utm_term=dynamic+anatomy+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383924/normal_5fbcf2af1c3c6.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/cdbe162d-ba6e-49b7-a09e-677b99ba6db6/vejida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa94af9c-2759-41d8-bf7f-08eba2f9e675/bofiruledosav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/239857ef-fbb4-45d1-8dac-1c58608fe94d/cod_zombies_perks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ebf9c5d-991b-4a90-b5d6-c29f8a534cf8/20797287087.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90e6f1a1-6277-4839-a6cc-0efe965d23a0/5534563822.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b89cde8-135b-4323-b4f9-c32e01e74a60/55261297247.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98e13218-1669-439b-aaaf-7dcae2b02e09/exponential_organizations_salim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f9aa55a-ab67-4888-9fd3-ad5b1cfd7472/french_stories_with_english_translation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd3d64f8-4e7a-4324-a832-e76e23aa3732/linear_programming_and_network_flows_2nd_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8593794-2f2c-4cc1-978e-73ec9cfbc5c2/polewiledizivubelot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eebe96c0-4e4b-44c1-bf3e-0115ea435f86/nivapadujidaxivejiwef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d70bc04-37a4-4b42-a994-34cef8a58dbe/77388518871.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47d9769e-8664-40c8-a479-ae344855990e/santa_claus_indiana_weather_today.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15b3326e-de65-421d-99a2-582817237a8c/80522123766.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/909f859b-fbd0-4125-94b2-6ce5847ebd30/radical_word_problems_worksheet.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_off0000cc8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC8F 3296 bytes
SHA-256: eafe598010a588129ee81d69bea4c906ade6bc6f7b13f0381ee06140b2278277
font_01_sfnt_off0000d868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD868 5096 bytes
SHA-256: 610ac620a74e4771c5bc2205f14c6d0940d8a8f709cd6dfa43bef53e07b5ee18
font_02_sfnt_off0000e9c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C7 10916 bytes
SHA-256: 4063db306bb73bb33d2690e13016b975e9b4898ae0b0aea860ee1b3a88953f15

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