Malicious PDF — malware analysis report

Static analysis result for SHA-256 10a2e38101132741…

MALICIOUS

PDF

87.7 KB Created: 2021-03-24 12:33:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3c471b2d9b796175a96a69efd6b43557 SHA-1: f837fedd341611da159ee0b534e419408594b4cb SHA-256: 10a2e38101132741956c6919cd396d12872d0830dbfcb2a2e4b85236d48c2d16
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The sample is a PDF document flagged by multiple heuristics as malicious, including a machine learning classifier and ClamAV. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document attempts social engineering by prompting the user to install a fake browser extension or update. The embedded URLs likely lead to the download of malicious payloads or further phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://seumenha.ru/strik?utm_term=how+does+a+mountain+lion+adapt+to+its+habitat PDF link annotation
    • http://timecodes.net/can_you_sell_food_from_your_home_in_south_carolina38n61.pdfIn PDF document text
    • http://sevastopol.sale/how_to_replace_the_battery_in_a_garage_door_keypadgbw8c.pdfIn PDF document text
    • http://iciapp.xyz/pifolafani7nc6t.pdfIn PDF document text
    • http://podarokinsta365.site/area_of_regular_polygon_worksheet_with_worktdqpj.pdfIn PDF document text
    • http://lnstagramsecurity.net/are_snapper_lawn_mowers_any_goodis155.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/hidY92I/bomber_jacket_outfits_guys.pdfIn PDF document text
    • http://itchia.space/tisesogomepukixabinzq0w6.pdfIn PDF document text
    • http://zerkalo-fugicar.website/letra_y_acordes_haz_llover_renovadosqevp8.pdfIn PDF document text
    • http://tosety.xyz/hp_designjet_5000_printery4naj.pdfIn PDF document text
    • http://airbin.top/kaxekuxjdk8.pdfIn PDF document text
    • https://cdn.sqhk.co/wawabosamugo/he6jbii/climate_graph_template.pdfIn PDF document text
    • http://lnstagramverifiedbadgeshelpcenters.net/website_er_google_chromeanh14.pdfIn PDF document text
    • http://axecheat5.xyz/how_to_be_a_hotel_general_managercgp5r.pdfIn PDF document text
    • http://prognoz-football.club/safapugunaxumupijawobhytq5.pdfIn PDF document text
    • http://bcpreactiva-enlinea.com/65349818676wc0j2.pdfIn PDF document text
    • http://monoga.space/4347267838555962.pdfIn PDF document text
    • https://cdn.sqhk.co/gizukakom/BjdtjbC/69949854696.pdfIn PDF document text
    • http://microbladingeyebrowsdallastx.com/arere_ekkada_ekkada_na_pranam_song9jur3.pdfIn PDF document text
    • http://vodoroding.info/custom_embroidered_hats_no_minimum_orderk0m0q.pdfIn PDF document text
    • http://dhl-order.info/17367153960o4m8h.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://liziraparexobar.epizy.com/a_concise_introduction_to_logic_12th_edition_download.pdfIn PDF document text
    • http://lupibewexuzu.rf.gd/blu_ray_print_tamil_movies_free.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_off0001196f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1196F 5296 bytes
SHA-256: f938e53d25608e0acb28c4be2bfa527020dee371781057edaa6d54a141872ab3
font_01_sfnt_off00012b55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B55 11136 bytes
SHA-256: f4aa6dc02975c88fbd81abc78897dcfb06bc6f4cde624619a705ddf1c9bf594b

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