Malicious PDF — malware analysis report

Static analysis result for SHA-256 52b84de15545b820…

MALICIOUS

PDF

48.5 KB Created: 2020-11-09 17:23:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: efe75f9a6d4cd2f4957c2db46dda7cff SHA-1: 1a8b40ecce5ecec2695b0ecad116dac01dd03a1a SHA-256: 52b84de15545b820f9bc4b149cbcb9edf215b8089fb02d0087ff84c31f386306
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/123?keyword=how+charts+lie+pdf In PDF document text
    • https://xidogofu.weebly.com/uploads/1/3/4/3/134307260/lugenoref_befuzaki.pdfIn PDF document text
    • https://folemazilepi.weebly.com/uploads/1/3/1/1/131164248/79d32d2a1caca8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409606/normal_5f9a2b4bbcbad.pdfIn PDF document text
    • https://fupuvoriru.weebly.com/uploads/1/3/4/4/134494751/0889301.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/7775416.pdfIn PDF document text
    • https://wojeribexojuxu.weebly.com/uploads/1/3/1/8/131856158/5c31ee.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/645718e2-57db-4b77-906d-f2095229c8dd/rifuxatujexoxafukidum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dab30f70-2102-44f4-878a-1db3ba995bca/seligotor.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/what_is_after_million.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/93473548183.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/pixel_gun_apocalypse_5_crazy_games.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/tarepusujukumemukezube.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/18040346122.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/pikejulu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A61 5296 bytes
SHA-256: 462d98a3f0e9904a364d472710f0425557719b2f08c6e136d8050e19652a5546
font_01_sfnt_off00007c71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C71 10484 bytes
SHA-256: fd43b33daf10fe206eb2632cd236d092f153d64458c67a908cd7edc6600a26c7
font_02_sfnt_off0000a082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA082 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2

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