Malicious PDF — malware analysis report

Static analysis result for SHA-256 d24a52d90d949c97…

MALICIOUS

PDF

86.7 KB Created: 2021-03-14 17:48:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 976482e56ebcadd839a2443d95b9e530 SHA-1: fd9a137d15e2e12a3659a7e3e5301d54c3c2368d SHA-256: d24a52d90d949c97605e864508f231eba92227852208e61763db16e5281a78d7
66 Risk Score

Malware Insights

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

The PDF contains embedded URLs, one of which points to a suspicious domain related to search keywords for a specific appliance. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a pattern of using disposable hosting for link farms, suggesting a malicious intent to obscure the true destination. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is likely a lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • 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://vilenefex.ru/wb?keyword=whirlpool%20washing%20machine%20door%20lock%20blinking PDF link annotation
    • http://fisareboveda.getenjoyment.net/24553006437.pdfIn PDF document text
    • http://xufuxenu.mypressonline.com/zusorolegivajenup.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxowowi/Xiaiivo/monster_shooter_platinum_edition_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tesosunimew/ighjUif/crossword_clues_and_answers_australia.pdfIn PDF document text
    • https://cdn.sqhk.co/vosiwuli/fihMjdI/duddu_my_virtual_pet_hack.pdfIn PDF document text
    • http://rezumitisud.mygamesonline.org/kugef.pdfIn PDF document text
    • http://wojurimaxab.mywebcommunity.org/diablo_2_hero_editor_plugy.pdfIn PDF document text
    • http://tosufiloxosi.66ghz.com/58724207786.pdfIn PDF document text
    • http://rexexepunefa.22web.org/was_genau_bedeutet_formulieren.pdfIn PDF document text
    • https://cdn.sqhk.co/darojopul/gokCejk/magezubinivuzikitixada.pdfIn PDF document text
    • https://cdn.sqhk.co/vitikitema/dhfigwy/luzuruwavowarowizofaxuv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ruvowepager.epizy.com/appassionata_sheet_music.pdfIn PDF document text
    • http://tiwokuvaredix.epizy.com/how_to_save_config_cisco_ap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e7b5d9e-246a-4648-93dd-9133a928a7d4/87720497232.pdfIn PDF document text
    • http://rozazidugo.epizy.com/varetimekufeked.pdfIn PDF document text
    • https://0e67983c-e844-40c9-b604-97311ec94efe.filesusr.com/ugd/6e13d9_870038d4bc634bc2a34d7fc9704c9bfd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ce70af2-2334-4b8c-bf4a-0d3a7f8e9c1f/vabuxuzefakibukenig.pdfIn PDF document text
    • http://givemuzod.epizy.com/keroverirafiwelo.pdfIn PDF document text
    • https://6ec3981f-6443-463b-a164-91fc69f101d9.filesusr.com/ugd/7603ae_ce80147829574275a8ffd27b5ae11673.pdf?index=trueIn PDF document text
    • https://4eb3a9b5-ca6a-4b2a-896e-878abc754f3b.filesusr.com/ugd/f1ab86_61876148629d497c83e72412a4ae4899.pdf?index=trueIn PDF document text
    • http://zaxenedapepobu.rf.gd/the_unwanteds_quests_book_6_release_date.pdfIn PDF document text
    • http://bigonezuneta.epizy.com/easy_way_to_learn_dutch_grammar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1810410-d0ed-4d50-a07f-bdd6b4830fdd/vurojozakiduxosel.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_off0001140a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1140A 5796 bytes
SHA-256: 4c58e9aaff59f4e22b30cf7160653b1a55e5a6d17cb9959d0561a10d7c318422
font_01_sfnt_off000127ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127AB 11108 bytes
SHA-256: e1669421c21f087ce1dd4b9d924b2081ca5522d5ed04ee8b9dd768c69543b5d6

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