Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ad6e25cca188786…

MALICIOUS

PDF

79.5 KB Created: 2021-03-20 20:06:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a3b927819025443cf9bc0248ff0743de SHA-1: 260679f28a83dacf18be41c84cc2f64c29461e26 SHA-256: 1ad6e25cca188786d1312b603999a5085048b82900bb2a9e293e3a7e84466cb3
134 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of external URIs and the heuristic for a 'download button' lure point towards a malicious workflow designed to trick the user into navigating to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gimoguvi.ru/award?keyword=lean+six+sigma+black+belt+study+guide+pdf PDF link annotation
    • http://tapavinologo.mygamesonline.org/71135180496.pdfIn PDF document text
    • http://wosedumuf.mywebcommunity.org/how_to_reset_my_adt_camera.pdfIn PDF document text
    • http://pornbustyvids.com/book_thief_audiobook_youtubel3c72.pdfIn PDF document text
    • http://virnet77.ru/monster_truck_hill_climb_drive_offroad_gamesel5k4.pdfIn PDF document text
    • http://mozodulo.iblogger.org/dj_remix_punjabi_dance_song.pdfIn PDF document text
    • http://veselutut.mywebcommunity.org/nowepopoleguzumibisuxuwoz.pdfIn PDF document text
    • http://padaxopawudu.iblogger.org/google_maps_road_view_iphone.pdfIn PDF document text
    • http://eurosett.net/memories_bring_back_you_text_deutschjrm9r.pdfIn PDF document text
    • http://januvasiw.22web.org/cursos_de_ingles_en_miami_gratis.pdfIn PDF document text
    • http://redit.fun/lexevozutivinebugitqgmhi.pdfIn PDF document text
    • http://macsk.space/937148207089jc7f.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
    • http://nukoxosexi.rf.gd/a_series_of_unfortunate_events_quotes.pdfIn PDF document text
    • http://wejanofe.rf.gd/genobodigexemuritujo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70a22e4b-5e62-4cda-b6fd-6b8e3161d4aa/new_star_trek_novels_2019.pdfIn PDF document text
    • http://difavokagakaruw.epizy.com/jean_baptiste_gugan_album.pdfIn PDF document text
    • http://fotafufoka.epizy.com/waiting_for_love_mp4.pdfIn PDF document text
    • http://bigapenegig.atwebpages.com/brake_test_on_dc_shunt_motor_theory.pdfIn PDF document text
    • http://nejimafalun.onlinewebshop.net/75644477088.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e235203e-7f7b-4714-91b5-e86a8b0761b1/matlab_plot_point_cloud_3d.pdfIn PDF document text
    • http://segixof.epizy.com/athens_fillo_dough_pastry_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed8fe364-b372-4d20-8d91-3a9ee6c24f47/50019947762.pdfIn PDF document text
    • http://jinoratizoja.epizy.com/xosufufasiva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17e82005-8642-4d36-a7c5-af0073dcc667/43278985090.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0214ddb9-b666-49e6-9b1a-f7250d0ce220/vumigaguwateditojugesu.pdfIn PDF document text
    • http://fuguduvuduwir.epizy.com/effects_of_illicit_drugs.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_off0000ec53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC53 5464 bytes
SHA-256: f1a4d5026cebe86e689ac4319cb34c5df960d214fec01439f348192f5f5e3ac0
font_01_sfnt_off0000fee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE7 10440 bytes
SHA-256: ee73a14d6fd94f0cac59b4f4b4de2e3f22e3b4bce959f817a845120b4282f098
font_02_sfnt_off0001223c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1223C 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3