Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0f8611d2a088f46…

MALICIOUS

PDF

85.8 KB Created: 2021-04-03 04:07:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 221b647670b712c42bf944aa984dafb7 SHA-1: 635dd8acb273b87833db9c45135d2de66603d9c3 SHA-256: b0f8611d2a088f46cd3c7d181b446c30829047cb3b6f8945065c59118d457b12
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one specifically pointing to a suspicious domain that mimics a search result. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the presence of many external links suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/award?keyword=paradise+lost+book+1+summary+and+analysis+pdf PDF link annotation
    • https://cdn.sqhk.co/jifonakilux/jjggjBL/cyclone_oma_news_report.pdfIn PDF document text
    • https://cdn.sqhk.co/situdejoj/37jdChi/puffin_web_browser_pro.pdfIn PDF document text
    • http://zagodutaf.getenjoyment.net/gokibodupox.pdfIn PDF document text
    • https://cdn.sqhk.co/bazopaxepifu/RTGdnDz/rowasonupagiwolawiziruj.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/hnjfuge/kick_horse_river_rafting.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/water_awareness_campaign.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvukidovime/5jeVCJ2/tetep.pdfIn PDF document text
    • http://zuberisuxivaki.scienceontheweb.net/87840183345.pdfIn PDF document text
    • http://vasizazesunof.medianewsonline.com/solving_equations_with_variables_on_both_sides_puzzle.pdfIn PDF document text
    • http://weridif.medianewsonline.com/arduino_uno_programming_examples.pdfIn PDF document text
    • https://cdn.sqhk.co/lezebulodiw/XYBJ6yX/fuganuzevawu.pdfIn PDF document text
    • https://cdn.sqhk.co/beratinuga/jhhgigh/68480517867.pdfIn PDF document text
    • https://cdn.sqhk.co/lakekomum/1Q6ax8Q/trucks_off_road_setup.pdfIn PDF document text
    • http://nemosixumeki.mypressonline.com/how_to_change_a_brother_toner_cartridge.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/9ad5ef95-d8d0-4c2f-b9b3-bd8f0ec56d7f/kakefux.pdfIn PDF document text
    • http://wewamamewiler.atwebpages.com/dd_5e_dm_screen_inserts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24797e7e-79e7-4eea-8611-1254e4901f88/how_to_set_a_g-shock_casio_watch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0641a165-3d8e-4571-876e-b659c05db8ae/how_to_pass_your_driving_test_in_alaska.pdfIn PDF document text
    • http://zuxokoberibaw.atwebpages.com/truth_table_in_logic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ed3e47b-6112-4d35-a420-9a90a40139a5/how_to_reset_vissani_fridge.pdfIn PDF document text
    • http://kewetanetoza.atwebpages.com/fmeca_analysis.pdfIn PDF document text
    • http://xirofapinowud.atwebpages.com/button_mushroom_compost_formula.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_off00010f13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F13 5548 bytes
SHA-256: 228fe4ea8a2474e50f971df98176e9c6d935d61e498b539b163955b820eb1cdc
font_01_sfnt_off000121e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E4 11648 bytes
SHA-256: ed90b4a0e3ed35f2a05eae66502969d00f4531382b4704e5c6de8d4219c60131

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