Malicious PDF — malware analysis report

Static analysis result for SHA-256 bddeed82d621f03f…

MALICIOUS

PDF

93.5 KB Created: 2021-04-11 13:27:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f5f470a41a63e177e078d1e9025b4003 SHA-1: 94545fd3baab987a3f00cd6095e1d0eca74d607b SHA-256: bddeed82d621f03fb7eaddbad2fc46090084591c368ccc935633e4e77612fd50
126 Risk Score

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 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/strik?utm_term=audacity+ffmpeg+download+mac PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367668/normal_602f4f157df4e.pdfIn PDF document text
    • http://duzegotola.medianewsonline.com/detalles_constructivos_de_techos_verdes.pdfIn PDF document text
    • http://roserubusigiwij.mywebcommunity.org/25484848307.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464542/normal_600ec2524d940.pdfIn PDF document text
    • http://grampus-shop.com/8725687334si82i.pdfIn PDF document text
    • http://ruxuzosok.mywebcommunity.org/83482204959.pdfIn PDF document text
    • http://vizenam.medianewsonline.com/devuvuwezepofele.pdfIn PDF document text
    • http://rejasikega.scienceontheweb.net/control_quimico_de_placa_bacteriana.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426967/normal_5fe41e63a4707.pdfIn PDF document text
    • http://molotkov.site/is_champion_generator_a_good_brand1nskd.pdfIn PDF document text
    • http://cooldomen.space/fishing_gear_for_channel_catfishsoi49.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/descargar_diccionario_biblico_griego_espaol_gratis.pdfIn PDF document text
    • http://pesuloduf.medianewsonline.com/51060238604.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461495/normal_5ff6275926038.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414500/normal_5fff41ea8514c.pdfIn PDF document text
    • http://didazema.mypressonline.com/how_to_fix_dryer_wont_start.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/9f392c8d-597a-4ca6-a835-2096d7e7108c/dd_3.5_players_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/450e46d9-9049-47bc-afd3-cbdf533db77a/nigobugal.pdfIn PDF document text
    • http://rivetibixonapaz.myartsonline.com/apspdcl_new_connection_application_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73715b36-3656-45b8-8f16-c3a340576fa3/75145684533.pdfIn PDF document text
    • http://moxadokikubod.onlinewebshop.net/look_back_in_anger_john_osborne.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/491d6248-80bd-46d5-9871-62af489866cc/semicolon_worksheet_year_6.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B26 5264 bytes
SHA-256: 3c4c247e218ddbb8feea170f5257efe294486a51fcdb1268e4e97e9c417cd6fd
font_01_sfnt_off00011d18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D18 11552 bytes
SHA-256: 45e94bc85351a97fdb8897d556b7cafa33d3bc1d3e232d11819bcec3a92189e6
font_02_sfnt_off0001446a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1446A 16388 bytes
SHA-256: 0c82561ead172ac0e51412abe629b5944d5f81f469066018c017fef234fe4ba7
font_03_sfnt_off000159f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159F6 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378