Malicious PDF — malware analysis report

Static analysis result for SHA-256 a705661dde532f3f…

MALICIOUS

PDF

89.8 KB Created: 2021-04-06 07:14:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 78790651d440fd54f3c20b8dd5e8d04f SHA-1: 406ce90bb6ad76bee36678d21ff2de0ff86df9aa SHA-256: a705661dde532f3fd9b96b0999fbbfec87b4b9beb1b433d1c2b06ef88593d382
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one prominent URL pointing to a domain associated with malicious activity. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://maypoin.ru/wix?keyword=ccsd+2020+school+calendar PDF link annotation
    • http://greatholl.com/point_guard_workoutwa35c.pdfIn PDF document text
    • http://futup.ru/mubakunifubgfamr.pdfIn PDF document text
    • https://cdn.sqhk.co/felinavaw/Ujigh4N/shadow_of_war_arena_cutscene.pdfIn PDF document text
    • http://zamowafa.mywebcommunity.org/disgraced_play_essay.pdfIn PDF document text
    • http://miribut.mywebcommunity.org/abrasion_resistance_of_concrete.pdfIn PDF document text
    • http://sunugukumota.getenjoyment.net/is_rock_band_4_still_supported.pdfIn PDF document text
    • http://fukoramilani.22web.org/sufibezejowimeja.pdfIn PDF document text
    • https://cdn.sqhk.co/nixafusoda/hjheuwt/sukunopazogomotezikok.pdfIn PDF document text
    • http://swiss-family.space/buzogizur205s.pdfIn PDF document text
    • http://kigegipumade.iblogger.org/branches_of_public_law.pdfIn PDF document text
    • http://chaptejvxz.fun/on_the_origin_of_species_quotesfggn0.pdfIn PDF document text
    • http://maxirem.mygamesonline.org/systematic_theology_john_frame.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/zepifudoxapo/weparika.pdfIn PDF document text
    • http://tefagagegupavos.rf.gd/po_box_address_format_fiji.pdfIn PDF document text
    • http://kokiralasido.epizy.com/pexixowagavibexupekeji.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/a_person_who_demonstrates_a_foible_most_probably_deserves.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/kinks_celluloid_heroes_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/posaxugidut/xopuninole.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/65728313100.pdfIn PDF document text
    • http://xevemifura.rf.gd/clasificacion_de_los_virus_animales.pdfIn PDF document text
    • http://sodexodape.rf.gd/64661735545.pdfIn PDF document text
    • http://negumigimewote.onlinewebshop.net/vajubabitalo.pdfIn PDF document text
    • http://vogufobitag.epizy.com/90545516303.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010dbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DBD 5208 bytes
SHA-256: 69777ba74783684e0eab0eb3068f8e107c04a75112a70bee6221fd8250c86c08
font_01_sfnt_off00011f5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F5B 1852 bytes
SHA-256: 227364d9dba4550c19188fba31a52a63e2f4f414b285d49ae8d9199a01c55a4f
font_02_sfnt_off00012831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12831 15532 bytes
SHA-256: ad735155eac5f90c57d890c8da529fc77b54e2d29877f550892ace01093e1fc6

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