Malicious PDF — malware analysis report

Static analysis result for SHA-256 75fa683e018d0934…

MALICIOUS

PDF

79.9 KB Created: 2021-04-16 18:07:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a912e70e6d538c0818f4391081e8bae7 SHA-1: cbce9a28ebb4881c507eaeb2ff12d783368f57fb SHA-256: 75fa683e018d0934fd86c80aad191c532baee362cf4f7b44a923aa8e8c524186
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing campaign. The document body, though heavily obfuscated, contains keywords related to 'Craftsman garage door trolley problems', likely a lure to attract victims. No scripts were extracted, but the presence of external links and the malware detection strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://botokaw.ru/strik?utm_term=craftsman+garage+door+trolley+problems PDF link annotation
    • https://cdn.sqhk.co/nimotixalulo/heie7Pm/mazaxuwamunifularokizi.pdfIn PDF document text
    • https://cdn.sqhk.co/sejarepezibo/71huHRK/89242342477.pdfIn PDF document text
    • https://cdn.sqhk.co/xipitufekaru/jcicRCv/king_female_soccer_player_kneels_for_national_anthem.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/9ZtPehc/swing_trading_stocks_vs_options.pdfIn PDF document text
    • https://cdn.sqhk.co/rudugebakivo/idojexB/black_ops_gun_strike_free_sniper_games.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/iiCjczP/black_praise_and_worship_songs_on_youtube.pdfIn PDF document text
    • http://formblckr1.xyz/samsung_scx-4623_printer_manualu7c72.pdfIn PDF document text
    • https://cdn.sqhk.co/lomekojop/hgiayIg/47708367791.pdfIn PDF document text
    • https://cdn.sqhk.co/jivomawufem/fi0hgia/lalemogusenujadimovopiva.pdfIn PDF document text
    • http://jatudoz.getenjoyment.net/99005445829.pdfIn PDF document text
    • http://alifan.store/physics_formulas_for_class_12_maharashtra_board6bh7i.pdfIn PDF document text
    • https://cdn.sqhk.co/kejofuvata/dgdgdTq/54384159107.pdfIn PDF document text
    • http://zijafanovidiz.sportsontheweb.net/87842247166.pdfIn PDF document text
    • http://santecmb-sarl.com/nowivuveruvogixelefizulaykxq.pdfIn PDF document text
    • http://load-bcp.com/balu_mahi_full_movie_hd_720p1supq.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://s3.amazonaws.com/dojonuta/appreciation_certificates_free_templates.pdfIn PDF document text
    • http://pusapovewazigu.onlinewebshop.net/herramientas_de_almacenamiento_en_la_nube.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/34113671023.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/binomische_formel_bungen_mit_lsung.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/how_to_pair_jbl_t110bt.pdfIn PDF document text
    • http://refusunono.onlinewebshop.net/minetigu.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/gulobulusemopovox.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/petta_audio_songs_mp4_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/3420072297.pdfIn PDF document text
    • http://vexabimumemig.atwebpages.com/kunixen.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_off0000ec08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC08 5368 bytes
SHA-256: b9ce10875148ebf9e08e8e34b858ec0c848b1532a57029f2d06749090d6639c5
font_01_sfnt_off0000fe37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE37 10476 bytes
SHA-256: c73e025983ba394e171469514654be5108a1eb378ffae6f1636e09177d29ecbf
font_02_sfnt_off00012207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12207 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333