Malicious PDF — malware analysis report

Static analysis result for SHA-256 e12f4aa170723320…

MALICIOUS

PDF

107.4 KB Created: 2021-06-03 03:12:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e834413b95b11e95b5e8788ecb6d0d99 SHA-1: 5b1af8b0498568189020686a548f09ff28a8e959 SHA-256: e12f4aa170723320b2150c30b0c76b37d80ff429a6e291ca79c265af7a9fbe69
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 0.9997

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 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://pixomot.ru/pbw?utm_term=ruhul+beyan+tefsiri+arap%25C3%25A7a+fiyat PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4445531/normal_5ffe2581bfea3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383680/normal_601a5840459a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421366/normal_5fe36a1077a9b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410983/normal_5ffb4f9207fee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488842/normal_5ff75c1ef05d9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jajisaparev.pbworks.com/f/pandas_get_first_row_of_multiindex.pdfIn PDF document text
    • http://lekuzax.pbworks.com/w/file/fetch/144414993/44500456403.pdfIn PDF document text
    • http://jesababa.pbworks.com/w/file/fetch/144425646/name_that_circle_part_answer_key_gina_wilson_2015.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96827386-feb5-4fdd-89c6-ca483a532543/50641525668.pdfIn PDF document text
    • http://nubuzefi.pbworks.com/w/file/fetch/144534351/what_is_romantic_realism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4216136d-23a8-483f-a31a-49f5a0123e9a/mafifipuga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e83b22ac-7d76-4ad2-8d52-3c949e3af75b/george_foreman_evolve_replacement_grill_plates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ac8e6e0-bf39-4562-a26e-e73d3b7b5e03/7261252453.pdfIn PDF document text
    • http://dajodovilav.pbworks.com/f/temuxutowoxaveg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fc26637-5a94-4370-963d-f11f8c40ac45/42983385004.pdfIn PDF document text
    • http://jujupaw.pbworks.com/f/ielts_paper_based_exam_dates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1662b7b5-1f7e-4010-a972-6fdb0aa3ba00/73123930862.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fba558cb-07c4-4173-afb3-9260f74a8cb3/71415137899.pdfIn PDF document text
    • http://vawaguzidatu.pbworks.com/w/file/fetch/144424053/how_to_download_fortnite_on_hp_chromebook.pdfIn PDF document text
    • http://barumena.pbworks.com/f/coloring_pages_for_preschoolers_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85e0b656-75b7-46ff-bb18-50b94b344d23/xofirarisuv.pdfIn PDF document text
    • http://xifilipisi.pbworks.com/f/erie_metal_roofs_pilot_program_reviews.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_off0001662c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1662C 5420 bytes
SHA-256: 4c207c252a5d7f5c8633c806e3f85755cf3bd1111cc45363e8a5f532a767ce3b
font_01_sfnt_off0001789a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1789A 11944 bytes
SHA-256: 77bfd28f506a7c54bec530de6aa605b387f27d06e688d36f7bd3cf975b8a2b15

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