Malicious PDF — malware analysis report

Static analysis result for SHA-256 e02911dfe29c3e10…

MALICIOUS

PDF

70.5 KB Created: 2021-03-26 08:32:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 66f13b23b3e3f85e82c59cef19dc85bd SHA-1: b79ff2d1d5455af1c856a3a9a1207038703b2eac SHA-256: e02911dfe29c3e10bfecce64484dfce8c51578f447c0924c46d4e227be9e6700
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML and ClamAV, as malicious. It contains numerous external URIs, many pointing to disposable hosting, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, indicating it was likely generated programmatically. The presence of embedded URLs and the overall structure strongly suggest this PDF is designed to redirect users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://gimoguvi.ru/award?keyword=partnership+accounts+pdf+icai PDF link annotation
    • https://cdn.sqhk.co/xuxinugad/k4uqUjh/heavens_to_murgatroyd_old_meaning.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366014/normal_5fd649038ebad.pdfIn PDF document text
    • http://com-servers.online/ferojixuw6bq70.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466379/normal_5ff8122df1600.pdfIn PDF document text
    • https://taferirufip.weebly.com/uploads/1/3/4/5/134582969/bemukasos_pigofatoru_lutuzudivixiso.pdfIn PDF document text
    • http://skywonder.space/kupewuguvidujalevet09itl.pdfIn PDF document text
    • https://guwubujurod.weebly.com/uploads/1/3/1/4/131438509/geramuzidufutanon.pdfIn PDF document text
    • https://cdn.sqhk.co/bisegepamitu/Mggjihg/at_t_enable_visual_voicemail_iphone.pdfIn PDF document text
    • http://pedron.fun/dirac_live_bass_management_nad_m10jemst.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413345/normal_5fe8a630b9e3f.pdfIn PDF document text
    • http://usacreditscore.info/nawewoxujemifuzubodolu6mwgr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449788/normal_600faecc86ce7.pdfIn PDF document text
    • https://cdn.sqhk.co/dedesonor/iihbpYK/85173206634.pdfIn PDF document text
    • http://buytoday.cc/harry_potter_planner_2021_amazon1cjfe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://288dffde-0386-48bd-adba-b069b5f3b70f.filesusr.com/ugd/7e1b39_540a1c11e41f4ecfb3e094369792dce3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0f21780-56fe-4c5b-8cfb-901ffcef0baf/triton_ii_sand_filter_tr100.pdfIn PDF document text
    • https://32e47638-7206-44c1-ad53-5c6f9176402e.filesusr.com/ugd/e00742_77b02aa6f8664438b5ff511993636ac3.pdf?index=trueIn PDF document text
    • https://4b5f4e46-8b81-4257-bf39-61fc08ba57b0.filesusr.com/ugd/7ea8bb_a1ad56d5c3b74d9abc05acc2da590954.pdf?index=trueIn PDF document text
    • https://3794eb9c-cc8b-492c-aecc-44533f76aaa6.filesusr.com/ugd/1ee69b_15802544e777409492c217cc2deaee48.pdf?index=trueIn PDF document text
    • https://6d4a8fb0-9a8a-4850-8aa1-2b5706121c9a.filesusr.com/ugd/ff2e72_f71cdbca6cb847f1907ba1d6c9f5d753.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cc3161b-9902-422b-80fe-619e1311a6db/halo_bassinest_swivel_sleeper_essentia_series.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/762035a3-53c3-46aa-be69-85c04cd663b7/how_to_set_image_to_picturebox_in_c_dynamically.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a335f83-270f-4879-bb5f-4d1d16742aec/8853483689.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_off0000d670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD670 5212 bytes
SHA-256: d51443eac3ef76bfb3ddfcbaa5a224e3fe3cf8d5496b747ff75acb64a5f77a30
font_01_sfnt_off0000e827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE827 10760 bytes
SHA-256: a12dcd7217ff03caf4248a8751b72baffdcecaf4c921c43dc9e446ef4a665884