Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b52d5d900d62ab5…

MALICIOUS

PDF

69.3 KB Created: 2021-02-26 00:46:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 99cdb33b85d5a0d840c901ca961ddd1c SHA-1: 0be56bda6d3657016d2b4923d3270cbfe08038cc SHA-256: 1b52d5d900d62ab55f8df0551076c6a42fe1dbecf0534425a846cba0c6478466
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://leonvi.ru/award?keyword=9.9+mercury+outboard+2+stroke+for+sale PDF link annotation
    • http://xobukafa.iblogger.org/ravikakogutogizebapugofi.pdfIn PDF document text
    • http://futegejetebe.22web.org/65984018028.pdfIn PDF document text
    • http://chambrely.xyz/dragon_dogma_quest_progression_guiderwais.pdfIn PDF document text
    • https://radogatibemif.weebly.com/uploads/1/3/2/8/132815767/jemexotaj_pedutojegik_danepus_jodubolupevow.pdfIn PDF document text
    • http://nosofave.iblogger.org/is_brawlhalla_cross_platform_ps4.pdfIn PDF document text
    • https://cdn.sqhk.co/gunonutib/bjgf9ot/infamous_definition_oxford_english_dictionary.pdfIn PDF document text
    • https://ketokaxuvora.weebly.com/uploads/1/3/1/8/131856042/7572688.pdfIn PDF document text
    • http://bobejitamatu.iblogger.org/afrikaans_translator_app_apk.pdfIn PDF document text
    • http://liolika-rsya.ru/47113240131sxif5.pdfIn PDF document text
    • https://cdn.sqhk.co/sebetite/e4cFMhW/what_is_today_s_date_in_spanish.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/fajixe/el_amor_en_tiempos_de_colera_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/bible_search_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/dowes.pdfIn PDF document text
    • http://nexovototato.epizy.com/mailchimp_templates_github.pdfIn PDF document text
    • http://tanenodu.epizy.com/kinunekotukubipupa.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/android_studio_update_build._gradle.pdfIn PDF document text
    • http://famereraba.epizy.com/atrial_fibrillation_management_guidelines_2019.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_off0000d0ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0BA 5696 bytes
SHA-256: 5f64472d9e17597acd40dafde4a50e5a3d33413704afc9543be60cea45a57177
font_01_sfnt_off0000e412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE412 10580 bytes
SHA-256: 3976fc1775f35e2477527f2edd49e5ec21d0bf4a1374edc638aa9b26f943f35f