Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bdcd3f8bd152dda…

MALICIOUS

PDF

76.5 KB Created: 2021-03-15 01:17:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 16f7f14d03bdedfd47a2f46557d3ea09 SHA-1: a8474bc72b9592a20e5bfe681203daedf841e60d SHA-256: 8bdcd3f8bd152dda410da3865b9c7d90c15d9aa82ab7ceb10665a9ae62122402
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, disguised as a search result for a book. This URL is likely intended to lead the user to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

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://dugedepap.ru/award?keyword=practical+celestial+navigation+susan+howell+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450884/normal_6048daa645548.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443354/normal_6010f7e824d09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448536/normal_6020b3b75b876.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456667/normal_602eea7b5b01a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406213/normal_6009d94d31a2f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417995/normal_5ff7f34803532.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_602cb2206f747.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459058/normal_6037cfea826ce.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/70848d5f-4f08-4de0-b557-4a8d6d6cc682/25900216793.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/52804058841.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff891193-b9ed-4438-a081-64718b5f27c8/discipline_and_punish_foucault_barnes_and_noble.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/77942316297.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24e16836-36fb-4270-a8b5-93f8ee7320d5/wuxulizixaxitaza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db08e264-726c-4ef8-a456-90b1dbd5c933/hp_laserjet_pro_400_color_m451dn_problem_installing_driver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6765de67-ae26-4441-aa92-1ed167d90a8c/canon_mp470_ink.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/what_comes_out_of_a_pimple_when_you_pop_it.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cddb7e7f-a8b5-4246-9295-868f966c2168/75650065890.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/231c197b-4d3c-454d-be21-a082cfa51da7/does_family_dollar_sell_pet_supplies.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_off0000edda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDA 5572 bytes
SHA-256: b697bfdf10f724ac1c9b983f2117f55ccdb2dc6ebc9598da9cd0113259e5fce5
font_01_sfnt_off000100d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D9 10652 bytes
SHA-256: 92ee6138178f1c21787bd412af36ccca43299d4077a7ddc6d1ab8f881178ebc6

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