Malicious PDF — malware analysis report

Static analysis result for SHA-256 253c4826f51105cc…

MALICIOUS

PDF

93.9 KB Created: 2021-03-14 07:23:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e7a771a230463d4d2245a92250bbc51d SHA-1: d8e3fc529e90055cb5803e5c876823a84e8cf777 SHA-256: 253c4826f51105cccc5d947d479021d059dc0179b368d5ccca60e0326d132814
146 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a QR-code lure. 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 0.9994

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 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://xezojetit.ru/strik?utm_term=best+price+on+kitchenaid+artisan+stand+mixer PDF link annotation
    • http://alkostore.xyz/dell_optiplex_7010_sm_bus_controller_driver_download4d4rp.pdfIn PDF document text
    • http://finonit.mypressonline.com/66443751462.pdfIn PDF document text
    • http://subonus.ru/442936123079k59c.pdfIn PDF document text
    • http://saniwofixapu.mygamesonline.org/ansys_cfd_post_user_guide.pdfIn PDF document text
    • http://omerkatanalp.com/formule_di_apertura_lettera_ingleseh892p.pdfIn PDF document text
    • http://jenuxijaf.mygamesonline.org/schlage_camelot_handleset_bright_brass.pdfIn PDF document text
    • http://glossywp.online/resnick_halliday_physics_volume_1_downloadcxyyg.pdfIn PDF document text
    • http://wowovamofuzo.sportsontheweb.net/fixibeduzuxisogatasoxiv.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/708c5f36-669f-4a5c-a357-a0c4a055f5cd/which_dvd_players_are_region_free.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/baal_veer_returns_episode_28.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5be732ce-af62-4fbf-a141-34c11660d8d7/11th_ethics_and_indian_culture_new_book_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/bokonujinuwokisu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/422fd73d-787e-4a1f-a9b4-0c08f7f76acb/varejuxisogiwasawevudagel.pdfIn PDF document text
    • http://xaviwawav.epizy.com/dodilufuvazek.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/pokemon_games_for_gba_roms.pdfIn PDF document text
    • http://sebebajo.epizy.com/luliwodezonofo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2432752e-38ec-4178-9cb9-1d1a6560bc78/dotewuvofewabo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bec3bb4-e2be-4c70-a28b-9e8e41f32f7f/fifty_shades_darker_movie_download_dual_audio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/197119df-e7fb-4ad8-8f4e-2f667537efc4/how_to_silence_west_bend_microwave.pdfIn PDF document text
    • http://wuparol.epizy.com/vujolejaloboxefowaxomok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/012cc6fb-6734-42cc-a1d5-2fb01212a677/what_is_my_zodiac_sign_by_date_of_birth_and_time_india.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_off0001026f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026F 5464 bytes
SHA-256: 50579727ea3215130c04f96045324addd3d3677ada76252edfe1fd4b6d49ec22
font_01_sfnt_off000114d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114D9 7816 bytes
SHA-256: eda4e609dedda29223185390fd72f3dbb280d0056814693adf093bd7a5da5062
font_02_sfnt_off00012a8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A8D 11304 bytes
SHA-256: 7bf661bac25f6368e78561581e93721264bf5fa2e705ecdd660a1eff2ead8503
font_03_sfnt_off00015142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15142 16544 bytes
SHA-256: 8d45f5f417e74c11d54eaee7138901bb4b2498e40dea16ccf89f2c2707c13e35