Malicious PDF — malware analysis report

Static analysis result for SHA-256 ece439f3854b083b…

MALICIOUS

PDF

73.4 KB Created: 2021-02-21 14:35:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d10ed6fa3aad6e15bbe894f76e58f3b8 SHA-1: 1996e0d3b0fc708bf470989fe3a5372c485c3686 SHA-256: ece439f3854b083b1972d04e837748097ee22525954bd47bd6771a7825b6a6a1
186 Risk Score

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/123?utm_term=club+cardi+reebok PDF link annotation
    • http://selozufuwadapuw.66ghz.com/how_do_you_know_if_your_transmission_fluid_is_leaking.pdfIn PDF document text
    • http://fbdirect.site/core_animation_advanced_techniquesum2ch.pdfIn PDF document text
    • https://cdn.sqhk.co/kewusikata/cRihcgf/nojadodijefiwopepimop.pdfIn PDF document text
    • http://kind-insta.site/rolowodezozotb1x6.pdfIn PDF document text
    • https://sudusomot.weebly.com/uploads/1/3/4/2/134265470/9337037.pdfIn PDF document text
    • https://cdn.sqhk.co/sepunaro/hhf0hcY/wifenakobofotigomajinut.pdfIn PDF document text
    • https://cdn.sqhk.co/suwapipejob/wtvSAgh/buvetalojilezax.pdfIn PDF document text
    • https://cdn.sqhk.co/sifajoxojif/dqy1gjK/criminal_case_supernatural_investigations_download_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxisilogok/hsjjufe/ship_games_simulator_pro_2.pdfIn PDF document text
    • https://cdn.sqhk.co/sarafogu/jgxjjjj/lajeselazarug.pdfIn PDF document text
    • https://cdn.sqhk.co/zawafolor/CidILNi/yellowstone_season_1_episode_3.pdfIn PDF document text
    • https://cdn.sqhk.co/tutabalero/eZ8e3Ty/craftex_warehouse_houston.pdfIn PDF document text
    • http://besemafobekilir.22web.org/cambridge_latin_course_book_1_translations_stage_6.pdfIn PDF document text
    • https://cdn.sqhk.co/vemegunir/eieNBje/toolbox_for_minecraft_pe_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/posuwumujome/8jaK7ic/phim_binh_phap_ton_t_va_36_k.pdfIn PDF document text
    • https://repemokalit.weebly.com/uploads/1/3/1/8/131856723/2640048.pdfIn PDF document text
    • http://websporizlehd.com/causas_de_los_trastornos_alimenticiosv6yxf.pdfIn PDF document text
    • http://uggi-ugg.com/idioms_and_phrasal_verbs_advanced_free_download97sjq.pdfIn PDF document text
    • https://wevejabunom.weebly.com/uploads/1/3/1/4/131406075/76f94.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F2 4864 bytes
SHA-256: 00ec47a69e25508ecc400732309436ffb8a9428808b23062fd8772592bd522c2
font_01_sfnt_off0000f386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF386 11072 bytes
SHA-256: 3bcadf76a0f6d34d69a2e82646a6d7a9cb45b5aa00d2e08f0de1fa67dd1fe133

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