Malicious PDF — malware analysis report

Static analysis result for SHA-256 1132b2cc9bbcc13a…

MALICIOUS

PDF

70.1 KB Created: 2021-04-08 00:33:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1d51520a8956eeae5cf8f652f0bc0e2f SHA-1: b9ed6eaf802d6be35272f23ff3dcaba95a699738 SHA-256: 1132b2cc9bbcc13a73c8d95111ec627ff76dd13c3fed7fd52569527e4bad1af1
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 0.9998

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://jacksth.ru/123?utm_term=nurse+uniform+buy+online PDF link annotation
    • https://fiwudarive.weebly.com/uploads/1/3/0/7/130775392/9c2dfcae0b7c32.pdfIn PDF document text
    • http://samoe-samaya.ru/bulave_tujhe_song_female_version6dbfn.pdfIn PDF document text
    • http://thepropheticapp.com/sululilunofgknao.pdfIn PDF document text
    • http://winoorama.fun/how_to_tell_if_pump_is_bad_on_washing_machinew623f.pdfIn PDF document text
    • http://itsamorem.com/how_to_use_bella_8_qt_pressure_cookerj9atq.pdfIn PDF document text
    • https://bemozepe.weebly.com/uploads/1/3/0/7/130739793/xujodakavebu.pdfIn PDF document text
    • https://cdn.sqhk.co/vugomupuzisa/jdjaahf/sling_kong_mod_apk_all_characters.pdfIn PDF document text
    • http://stickerrus.ru/22278108634mkzzj.pdfIn PDF document text
    • https://cdn.sqhk.co/gepabafi/in7RPib/30579831082.pdfIn PDF document text
    • http://usesol.xyz/615587764395arek.pdfIn PDF document text
    • http://mstmail.space/music_player_app_for_android_without_adso2o58.pdfIn PDF document text
    • https://cdn.sqhk.co/gimexigerub/xgdjhhe/installer_l_application_canon_print_inkjet_selphy.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/faluzotixupi/free_driver_motherboard_asrock_g41m-_vs3.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/music_artist_profile_template_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68d7f979-cade-4e5d-ab1a-64558a612e07/tom_clancy_jack_ryan_movies_in_order.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/image_licence_agreement_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c85775b8-81aa-4fd8-9f8d-935b479c6b60/sogamadenafotopunamujus.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_off0000d559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD559 4912 bytes
SHA-256: 04b228227643a30e91f7b310f74470970014770de8a69097989e3f6129c5436a
font_01_sfnt_off0000e609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE609 10588 bytes
SHA-256: b73af5bb50a508a80868b561b01c1fc11911c5f95986f424398632b4326a8675