Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbd902459f355d37…

MALICIOUS

PDF

69.2 KB Created: 2021-06-02 08:57:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f206b201ddaacbc663e86f3f6f47f7d1 SHA-1: b240017d4cabb794457f690cdbde17ed438e9707 SHA-256: bbd902459f355d3745e639233b3c1b9c2733bb06e02098a3630b8d6372f55092
156 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 a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://laborke.ru/pbw?utm_term=how+to+make+animated+stickers+for+whatsapp+reddit PDF link annotation
    • https://tasitonedilegu.weebly.com/uploads/1/3/5/3/135301248/6048761.pdfIn PDF document text
    • https://febujularezot.weebly.com/uploads/1/3/0/8/130813651/sazenal-tovesiw.pdfIn PDF document text
    • https://fobopogukigu.weebly.com/uploads/1/3/4/3/134366855/5435477.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/ca753efa-a5b2-4ce9-a78c-ba65d8793770/hayward_h400fdn_heater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae5ab0ed-3c75-4e7e-8660-0a4d0a8e67f5/meade_lx200_classic_hand_controller.pdfIn PDF document text
    • http://sutodoromar.pbworks.com/w/file/fetch/144490143/82269851429.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be74f545-0016-4ad1-8d84-b377280b17a9/how_much_is_a_lennox_furnace_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b28994c9-f873-45fd-9ab5-5e1b446e8388/i_love_you_rituals_poster.pdfIn PDF document text
    • http://pilujibos.pbworks.com/f/how_to_write_an_internship_letter_to_a_hospital.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f4b9dd3-c417-41a3-813b-0044a54cebd9/the_lorax_movie_release_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e72540e3-d3ee-4572-810d-7d0388145184/how_can_teachers_become_culturally_competent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3088f57d-bb6e-4a3f-b53c-3903f61ad775/35583008769.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b17e0b7-868a-4013-a9ec-dd65383afbf3/20845815030.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e046dfa4-d7e2-46de-8ca7-6bf98a81cbbc/statics_and_mechanics_of_materials_bedford_fowler_liechti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b090e94-95e0-4634-a37b-9c24177377d5/mechanical_engineering_jobs_for_freshers_in_bangalore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/663949e4-e23f-4f24-8ad6-72c74c1cd575/31903271594.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2216f0f-1e7d-40a8-b01c-dff58870fd13/dont_look_back_film_streaming.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_off0000d10d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD10D 5480 bytes
SHA-256: 8ff6327465837a32d7c7910cb8f9bb6f3d4411fa670354ca026604b8a330b574
font_01_sfnt_off0000e395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE395 10532 bytes
SHA-256: aad19d3ceb026fb1c2ecf9538e6a393ecd49bc8f145496146e9b2c781ce12add

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