Malicious PDF — malware analysis report

Static analysis result for SHA-256 f371b3caf0c645bd…

MALICIOUS

PDF

76.9 KB Created: 2021-03-29 10:11:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 492e5c9c43326d20dc19c72d551af362 SHA-1: 3158ab341664eb25be90d027f1c7c8b26744b5f6 SHA-256: f371b3caf0c645bd59a526fe203d2c68b67f7ff671b4b228f4d6bd8a047b5290
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://pelibifir.ru/wix?keyword=acs+exam+study+guide+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4381536/normal_6005b3b91fa04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366659/normal_6022b02deff9b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474722/normal_5ff8034c88f19.pdfIn PDF document text
    • http://zekifafeter.scienceontheweb.net/how_to_hard_reset_ipod_nano_6th_generation.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375521/normal_5ff2cae51c49a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489596/normal_5ff132f30995b.pdfIn PDF document text
    • http://fesunasisodenod.getenjoyment.net/womowikip.pdfIn PDF document text
    • http://sosyaltakipcipanelin.com/how_to_reset_an_lg_washeryht0e.pdfIn PDF document text
    • http://it50disconto.info/wgn_america_news_nation_appk06mh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448720/normal_601bf956f3565.pdfIn PDF document text
    • http://alex-travel.moscow/kobipimaxgs37y.pdfIn PDF document text
    • http://zeboxagekej.sportsontheweb.net/22791516659.pdfIn PDF document text
    • http://gexafozo.22web.org/annual_report_bksl_2017.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416501/normal_5fe6d0bd0b5b0.pdfIn PDF document text
    • http://lynciguest.com/54156018478j5q6j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416506/normal_603462155abb5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390641/normal_6008877e89427.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mifumupesa.rf.gd/rurisa.pdfIn PDF document text
    • http://vorisenunajix.myartsonline.com/segijazoxemizijuwu.pdfIn PDF document text
    • http://rekabalukog.rf.gd/patonuwedenure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fc480af-3a52-4d2e-bcb7-910c27a0a2b4/nekoki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9aafdb3-9511-42bc-9be0-2e193a6e219d/gavokekogufomitevinifalet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99cae3a4-d4db-4614-a40e-fc2441bc9d63/58203935722.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7ac3ee6-31bf-4796-a654-51481093e469/ashrae_handbook_2015_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f2a2f2a-ce38-43db-9e6a-0a3fe51d5779/47021560460.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_off0000f159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF159 5508 bytes
SHA-256: 4b633584ca9279913ab71b9867c41a3115d0fc46af1e4e1ea231dbe0cf8fd1a7
font_01_sfnt_off0001041c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041C 9868 bytes
SHA-256: 896b41082a20e797bb4ab1903d32d08d9ee87045d8d998ad1c30e480d49327cd

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