Malicious PDF — malware analysis report

Static analysis result for SHA-256 390e341b9aa2f681…

MALICIOUS

PDF

67.3 KB Created: 2021-03-12 17:37:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: feef0f08e608a2827589d8f25e0cd31e SHA-1: 605e449a9f2fb4b2dce71e3705b0950f3cf45a1f SHA-256: 390e341b9aa2f681816ea6971113c7e42c4c99e791d4f68559937c64f4e2afe0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://jumiwimov.ru/wix?keyword=los+dones+del+espiritu+santo+en+ingles PDF link annotation
    • http://kigurumi.org/87236124531pp1w2.pdfIn PDF document text
    • http://abwaab.su/lodibupn0mun.pdfIn PDF document text
    • http://nipokaxa.getenjoyment.net/bumokizezex.pdfIn PDF document text
    • http://save50it.pro/does_verizon_have_a_4g_flip_phoned5yem.pdfIn PDF document text
    • http://micrometer25bill.site/regina_olson_hughes_known_for25x7i.pdfIn PDF document text
    • http://premium-cinema.com/the_story_of_the_two_wolves_inside_usyto47.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/balanced_scorecard_template_for_restaurant.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e2d6b54-29e4-4280-a3ce-60b7abd2de64/how_to_block_my_knitting_project.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e06094fc-8b00-4534-89b2-f8431c4f7e3c/30174780750.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/045de223-1ef6-4846-878f-2354283ed57d/vocab_flip_book_template.pdfIn PDF document text
    • http://dexivovadoxexo.myartsonline.com/medicina_antroposofica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ad13dc6-6b03-42e9-af70-22bbd2664b28/70546817010.pdfIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/77551150577.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28c6b622-f3f2-4b71-af35-0affa4791053/what_are_the_physical_properties_of_salt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78aaf39f-1013-49b0-a524-f14daec7aaf5/gaxetuxo.pdfIn PDF document text
    • http://zotubune.myartsonline.com/the_monkey_king_movie_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/nibeguzixamepijora.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/delete_duplicate_rows_in_google_sheets.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_off0000cb07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB07 5068 bytes
SHA-256: 7d50dfbe7b6f91225a7288cc7c23547bfe0e792c76e502addee74b23b672c2b0
font_01_sfnt_off0000dc51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC51 10392 bytes
SHA-256: 3f661b5e3af5e71891629299c36c00d6c903550dd44bf0c1f798f452547516df

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