Malicious PDF — malware analysis report

Static analysis result for SHA-256 303e0dead53f105a…

MALICIOUS

PDF

79.3 KB Created: 2021-03-08 05:15:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e743f6c501aaaad4ca6252e9055f9119 SHA-1: bbc929e299b080dc3847b3dfa81228c6a285e718 SHA-256: 303e0dead53f105a4f4b7b9c1a8bbe82c5d1721edc75eb2af5b97e4b233eee29
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a link farm and an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains keywords related to the embedded URL, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/strik?utm_term=ge+appliance+repair+service+phone+number PDF link annotation
    • https://cdn.sqhk.co/zotenejek/hVghjhq/46686822883.pdfIn PDF document text
    • https://pupalizote.weebly.com/uploads/1/3/4/7/134716330/4785244.pdfIn PDF document text
    • https://cdn.sqhk.co/gizukakom/lFDhfhb/8770022456.pdfIn PDF document text
    • https://cdn.sqhk.co/jukelifawap/ibGXhaZ/menukofeveguwos.pdfIn PDF document text
    • https://bizotimugir.weebly.com/uploads/1/3/1/1/131164076/2221983.pdfIn PDF document text
    • https://cdn.sqhk.co/pafevola/jHIgfi7/64415563903.pdfIn PDF document text
    • https://cdn.sqhk.co/mugejufunij/igc3Qif/kodex_leverage_stock.pdfIn PDF document text
    • https://litazotivov.weebly.com/uploads/1/3/0/7/130740097/965527.pdfIn PDF document text
    • https://cdn.sqhk.co/barugogip/idPphj3/download_pixel_battle_arena_multiplayer_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/fagaxirupunu/hegdTDL/creations_pottery_and_craft_studio.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/1eb1fcb9-cb2e-4b9b-80de-6584b3fb198f/literature_review_discussion_and_conclusion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd84de18-5fbe-4624-8b4c-b9c835203699/after_we_fell_review_spoilers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbbbed7a-2e50-473e-9ae1-7dcadebc9c08/mavomo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96659b91-3952-4153-baf6-b1b3575604a1/sujupapuzopomi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22748038-71c3-4388-9362-3e6e2614bf04/pizusu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ea5b757-9b83-4ef2-963a-1a1437606c51/language_teaching_approach.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/922486b9-699b-41fc-aa1a-f5b82da53ca0/lugutowi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2550db7-c8a2-480e-a99e-d2edc0caaf51/8839215557.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2680d4ff-b0b6-438c-9ad1-1e31b202c46a/who_is_lestat_in_interview_with_a_vampire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a14dc58-e6b0-4a98-8cde-dafe972c0cc2/2020_ktm_50_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc190b1e-637a-4b80-9581-e1b5d92d4fb3/84291875995.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddf324bf-df92-4faf-8224-7c5adcdbdfa4/tabof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de516454-85fc-4da8-a312-9388f7bd13fa/is_hp_envy_4500_a_laser_printer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/542d46e5-45a5-4ca2-9c9d-8e4ec5922d43/bodyweight_workout_for_bigger_biceps.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_off0000f99b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99B 5404 bytes
SHA-256: 810e1eafb3e6851d09271d1403f0b9f0fd157d763ea3542ddf0482081a8ac2cb
font_01_sfnt_off00010bd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD4 10540 bytes
SHA-256: 553b4bd1469248b2c2cedebf2de21cf5d64b83c46f82d6cfebd2048e8e907b78

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