Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3e4f128b15d49a1…

MALICIOUS

PDF

83.5 KB Created: 2021-05-15 03:43:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a784b0d0b4f0e64d8a95c5c1ce629a7d SHA-1: 7f29a8a4f8eef975647e60a07ba4692bd67df912 SHA-256: e3e4f128b15d49a1b303cc15efe3071207f123e47ab3babb897ac47657a90f7f
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs, one of which is `https://lozipotod.ru/strik?utm_term=ion+record+player+bluetooth+instructions`. The document's content is designed to appear as instructions, likely as a lure to encourage clicks on these malicious links. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • 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.
  • 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://lozipotod.ru/strik?utm_term=ion+record+player+bluetooth+instructions PDF link annotation
    • http://xofitazuregokud.mywebcommunity.org/zodikojubilaz.pdfIn PDF document text
    • http://gojawufeki.getenjoyment.net/what_makes_an_argument_valid_in_logic.pdfIn PDF document text
    • https://dawijenumekoxel.weebly.com/uploads/1/3/6/0/136087820/52a30260.pdfIn PDF document text
    • https://setibadumizokeg.weebly.com/uploads/1/3/4/8/134880372/nusumoto.pdfIn PDF document text
    • http://xonitaj.mywebcommunity.org/48302709984.pdfIn PDF document text
    • https://ketezujozak.weebly.com/uploads/1/3/4/7/134744557/zitumimugep.pdfIn PDF document text
    • https://famopenagunabot.weebly.com/uploads/1/3/4/6/134688774/zewodugamabaz_sinafibadegune.pdfIn PDF document text
    • http://pedagodogiko.getenjoyment.net/posijepagadaxu.pdfIn PDF document text
    • https://goxuxogegeta.weebly.com/uploads/1/3/4/6/134688707/8459113.pdfIn PDF document text
    • http://javosewo.sportsontheweb.net/arduino_library_tutorial.pdfIn PDF document text
    • http://punavuvipufov.sportsontheweb.net/77035571023.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/3d0bdbae-8d0c-49db-8627-4c85a1135a79/pavexeziwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43038f12-6b99-4250-b0c0-60f1822b6736/72716821813.pdfIn PDF document text
    • http://jugomirusulove.atwebpages.com/37866719228.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4d2eb61-db29-42c2-8b30-1d5107c17dfe/xugitazuresukosusoxosika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e72270fd-3341-4e61-90d8-5c6329c25c36/samsung_galaxy_note_4_fast_charging_cable.pdfIn PDF document text
    • https://9eaa565e-fb97-40b4-b096-d6760803f699.filesusr.com/ugd/55e2c6_d81bcaa280a847ebb2dff4e4e6e1d252.pdf?index=trueIn PDF document text
    • http://xologikaju.atwebpages.com/is_there_a_season_2_of_selection_day.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0edb5287-9b9b-4c1b-80b4-17c15c85888e/zukumezofejosokowebu.pdfIn PDF document text
    • https://ae8c1479-5121-4009-b0ed-8259dbb1205b.filesusr.com/ugd/0aff45_83c624082e93478f980077fc683ebef4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd9401a8-2e26-4d59-8c9a-af0b23991b83/dujoridobovosoxozimojim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7045cfa-5b2b-408f-8fc7-ecbaf0c2c336/leon_uris_exodus_film_deutsch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b127691-8018-4602-ba0e-90264d2f7fb9/what_age_is_26_inch_chest.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdb7b4c4-c093-4ce3-9935-b83c217eb077/2635597479.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09a2f978-a1aa-480f-812b-71aee7669ae0/do_part_time_employees_get_benefits_at_amazon.pdfIn PDF document text
    • https://54957a25-093b-4cbd-a4f0-8eb5fea931f0.filesusr.com/ugd/8ba634_6c00794587534c32adcf219af340ed2a.pdf?index=trueIn 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_off0001067f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067F 5340 bytes
SHA-256: f87f016c236fe7c19e56d7dcad1f0882f6bc4ff1c9dbbe084f925479aa576d81
font_01_sfnt_off0001189c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1189C 11180 bytes
SHA-256: be86997105ac24461ea01953c10794be17072ef4ea8a7911e1745dee37848bc9

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