Malicious PDF — malware analysis report

Static analysis result for SHA-256 0916cf1d0195c194…

MALICIOUS

PDF

87.1 KB Created: 2021-03-27 11:13:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 96630f16986d43f70435faabbc128bf3 SHA-1: 03f1b182fb96c684a5e6d2bc2b59ef5944f174a9 SHA-256: 0916cf1d0195c194df0c171132e2d536972d3048eae52e55a2dbe686f4141c5c
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. It contains numerous external URLs, many of which are hosted on disposable domains, suggesting a link farm or redirection scheme. The presence of embedded URLs and the overall structure indicate an attempt to direct users to malicious content, likely for phishing or to download further malware.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ponafet.ru/123?utm_term=cardiopatias+congenitas+sociedad+espa%25C3%25B1ola+de+pediatria+pdf PDF link annotation
    • http://xavesusefowale.mywebcommunity.org/binomios_conjugados.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366366/normal_5fcefda549e3e.pdfIn PDF document text
    • http://bugivaf.22web.org/63321078190.pdfIn PDF document text
    • http://kakolamilasaru.medianewsonline.com/faxexawelemetereza.pdfIn PDF document text
    • http://tinubovibiwiwi.iblogger.org/logo_quiz_answers_level_259.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484990/normal_604690feb99b3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pupuwejerew.epizy.com/brene_brown_shame_shields_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb43b12a-0f1d-4123-9c58-78f86e2604be/41480254643.pdfIn PDF document text
    • http://kololujes.rf.gd/academy_stars_2_macmillan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5b89b82-315c-4faf-bace-349ab053b593/24428506890.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4227efce-d867-4b65-b3e9-a8d6d52e0cb5/genie_pro_max_opener_type.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da84adfb-65ae-48c3-97ab-0ba2e8563977/giwipovuradimijikereki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bef820f8-5d17-4d13-a666-6f19ddca0768/metulewewipakebatami.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de9a312a-67b2-4259-bac5-cc5a10384182/72616399234.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7383d89d-06c4-4f4a-a305-c5b6e5e06509/brother_p-touch_pt-90_label_maker_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc642b28-4c73-4d12-aca6-b1490640ab3f/what_does_the_peroneal_artery_supply.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ed55075-5149-4570-958a-04b4d142600c/69666752469.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af49c50b-1732-47e9-8205-16e43d6d9467/what_are_the_three_basic_problems_of_economics.pdfIn PDF document text
    • http://vusedew.myartsonline.com/counting_numbers_worksheets_for_kindergarten.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0a967df-3ef9-4746-8e9f-d73e614524f7/12631864044.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_off0001129c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1129C 5440 bytes
SHA-256: e56271aee692c02b1c2732925243b11139fc1eee2040d9351e22063eb350c16c
font_01_sfnt_off000124e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124E7 12068 bytes
SHA-256: 96c0c631f6d3d7f0cab74436d2740751e36edb110671d2ffd8924c92be07ee67

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