Malicious PDF — malware analysis report

Static analysis result for SHA-256 594313b35c398c45…

MALICIOUS

PDF

72.8 KB Created: 2021-03-09 12:06:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2fd29fb4da34b1607f9108bf1dc0930c SHA-1: ec34d7527b72ee97ee8208cc8dcec307a733629c SHA-256: 594313b35c398c450441a4534abe9336cd8afb05abe2fe69174c8194777a2198
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9956

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://crophysi.ru/award?keyword=pathophysiology+of+disease+lange+pdf+download PDF link annotation
    • http://degitowexara.iblogger.org/5863249748.pdfIn PDF document text
    • http://famuxapow.iblogger.org/how_long_does_razor_e300_battery_last.pdfIn PDF document text
    • http://digitaltoolsfor.xyz/best_usa_free_dating_apps_2020s2pa6.pdfIn PDF document text
    • http://magowowir.iblogger.org/gecko_spa_pack_error_codes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392191/normal_603ea89c1a426.pdfIn PDF document text
    • http://reawont.online/zulily_a_new_store_every_daydxflx.pdfIn PDF document text
    • http://majusenise.sportsontheweb.net/bimazifexadoxanojak.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/mjdhdDk/dizziness_racing_heart_nausea.pdfIn PDF document text
    • https://cdn.sqhk.co/xajevedu/chjhias/34960998846.pdfIn PDF document text
    • https://cdn.sqhk.co/zolaxadivowe/ad1Hkhc/minerals_are_inorganic_elements_that_the_body.pdfIn PDF document text
    • http://repaircreditscore.info/how_do_i_get_an_ifit_activation_code2qfgw.pdfIn PDF document text
    • http://euroshopmn.space/rafedvqg6r.pdfIn PDF document text
    • http://tedurelaseji.mygamesonline.org/29206303584.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403937/normal_60088f872560e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415534/normal_5fcfafc5c9046.pdfIn PDF document text
    • http://podcard2020.site/27136865470mh9d6.pdfIn PDF document text
    • http://zixudivibudizu.scienceontheweb.net/nuvukuvex.pdfIn PDF document text
    • http://nowukusox.mypressonline.com/duzilobasujefasasepuwijo.pdfIn PDF document text
    • https://cdn.sqhk.co/berazanoga/jaHbuhf/estilo_de_vida_saludable_frases.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501965/normal_5fdffc2d13168.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zivufev.rf.gd/how_to_get_best_buy_movers_coupon_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/os_cuneiforme_mediale_intermedium.pdfIn PDF document text
    • http://positajugopisu.myartsonline.com/36000765318.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/bepijezanotuju.pdfIn PDF document text
    • http://gabinosemepof.epizy.com/20707276648.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/crafting_guide_osrs_f2p_profit.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/jefofagulabifusimobadibo.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_off0000de16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE16 5404 bytes
SHA-256: a06004e336f97e5c678d1a28243cb7d3d3ec601c5d57d5e3c1e34e540a9c9cf5
font_01_sfnt_off0000f094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF094 10708 bytes
SHA-256: 1b53c16dbd6d3209ab1245edfba3648caa758bfd6855d3e0b28bb6fc6abc219c

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