Malicious PDF — malware analysis report

Static analysis result for SHA-256 213fb47d6795f98c…

MALICIOUS

PDF

75.3 KB Created: 2021-03-30 11:26:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f4d2370fb079709f5c8f701f33c7846e SHA-1: 2227a4f46578c20b3aad2cc96a21e09a302d7ff2 SHA-256: 213fb47d6795f98c12160769928d3cf3e372bd0f8fbb63c6c53d81d648ff7700
136 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it's a phishing lure, specifically using an image to redirect users to an SEO redirector. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URL points to a phishing domain, likely intended to trick users into providing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • 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://gimoguvi.ru/strik?utm_term=what+does+the+sign+4-way+mean PDF link annotation
    • http://gizovivomiz.getenjoyment.net/60736912771.pdfIn PDF document text
    • http://bibuzikufaje.mygamesonline.org/can_i_notarize_for_family_in_michigan.pdfIn PDF document text
    • http://tortomsk.ru/does_dunkin_have_iced_chai_lattesdr6fq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367004/normal_603ad57dc0378.pdfIn PDF document text
    • http://aires.fun/kirefuluzur6cv3w.pdfIn PDF document text
    • http://trokot-tonirovka.online/79149510810305rf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453900/normal_5fc59383e6ff0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409244/normal_5fd60e9339d78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383147/normal_5fe81ee5e2894.pdfIn PDF document text
    • http://elerctum.org/fashion_makeup_dress_up_appfweyr.pdfIn PDF document text
    • http://libertinemodels.com/best_chocolate_mud_cake_recipe_everc37oi.pdfIn PDF document text
    • http://xewodatesuporob.mypressonline.com/19160205352.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/pusixa/angel_olsen_all_mirrors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51b018e1-2b91-472e-b3b9-4446cb63d184/memorias_de_mis_putas_tristes_pelicula_gratis.pdfIn PDF document text
    • http://lolunoxij.myartsonline.com/illinois_vehicle_bill_of_sale_template_fillable.pdfIn PDF document text
    • http://kaloruligot.onlinewebshop.net/tiduwodivezib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96927ef5-e314-4fc3-b261-5815fce7f4e1/apc_back-ups_es_750_surge_protector.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/como_agua_para_chocolate_book_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd9e8664-b948-414f-abdb-8093c5eba424/lenotijalukakuje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4cbfb0b-ce08-4e0a-a749-e3fc0a877056/35131758954.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/how_to_program_rca_rcrn03br_universal_remote_control.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/banner_saga_characters_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/6198283287.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0b62e6f-946c-42db-96ba-b6dac56e2317/jarabezutejuvo.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/bluestacks_whatsapp_free.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/hp_laptop_price_in_nepal_under_60000.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_off0000e97e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97E 5440 bytes
SHA-256: 4bd377fd0259ec95e714c7762750f0c72c1739656ed7933e60f5c765af9b8cae
font_01_sfnt_off0000fc07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC07 10460 bytes
SHA-256: dbb32bec42f1c21b67677db61e6b3215088dc0d76ef3bded1c7e138016faabff