Malicious PDF — malware analysis report

Static analysis result for SHA-256 af0f07b87bc4d08d…

MALICIOUS

PDF

78.9 KB Created: 2021-03-23 09:25:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: aaf96648d74ee00421ddeedfa63766b6 SHA-1: dfad729e576f688fcd2f7e0b8a813a0ad2504d3b SHA-256: af0f07b87bc4d08d406d924988507e4d227cf51d1a5f76d88a2e59924bcea721
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dugedepap.ru/123?utm_term=gerunds+and+infinitives+exercises+with+answers PDF link annotation
    • https://cdn.sqhk.co/xefilelo/ajgMmif/pinata_hunter_3_hacked.pdfIn PDF document text
    • https://cdn.sqhk.co/dijabidasu/RRigNhe/tovugisevij.pdfIn PDF document text
    • https://cdn.sqhk.co/xenudipu/oZVhjif/online_mobile_recharge_idea_full_talktime.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwaseja/genc6NY/lafujizitekidibabex.pdfIn PDF document text
    • http://nakanilo.club/risodapepapatur0lxee.pdfIn PDF document text
    • https://cdn.sqhk.co/josipinu/jqghXQU/bujeputosuwu.pdfIn PDF document text
    • http://copyright-infringement.business/best_free_html_templates_2018bw91a.pdfIn PDF document text
    • https://cdn.sqhk.co/velabolo/fja2Oha/adelantado_trilogy_book_three_online_games.pdfIn PDF document text
    • http://50offshop.pro/zurivelegokedagluel.pdfIn PDF document text
    • http://znasila.ru/education_psyche_reading_answers_ieltssh5xr.pdfIn PDF document text
    • https://cdn.sqhk.co/wusakituzu/a1TSIi0/disneyland_hotel_reservations_paris.pdfIn PDF document text
    • http://antonioit.fun/65496889017nqqhr.pdfIn PDF document text
    • http://thefortykuti.com/amma_sentiment_songs_free_starmusiqew2sx.pdfIn PDF document text
    • http://lnstagramverifiedbadgeservice.com/bob_2016_revolution_pro_duallie_jogging_stroller7lsd9.pdfIn PDF document text
    • https://cdn.sqhk.co/tupujokuz/cE5rEx3/spinner_io_mod_apk_revdl.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/tobito/planet_fitness_club_fees_covid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6cbe893-8860-45f5-800f-ac5f82aea54e/making_content_comprehensible_for_english_learners_3rd_edition_isbn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7102404e-4b3e-4aab-b860-9511e1b97837/ford_mustangs_for_sale_in_vegas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0a93bbb-2a56-43c5-b12b-8bb3c82b0c1f/espn_30_for_30_podcast_list.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/grim_dawn_cabalist_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ac9d6e4-72f0-4c2d-ac1d-d2a1b2fc689d/whirlpool_gold_series_fridge_filter_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eb55a83-7a9d-42f0-b3ad-0502e9590d99/ruzunepesuliweveduzonukeb.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_off0000f506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF506 5328 bytes
SHA-256: 284b2bf72964c9e4e655468acdba501292cff804bf5bd2b85d2433938bb36cf7
font_01_sfnt_off00010739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10739 10940 bytes
SHA-256: d264298309a18d5b514ced1c1216accd300d901cd37dc3fdc9d0e44a6c49df76

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