Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b80dc2c90a0a8ec…

MALICIOUS

PDF

79.5 KB Created: 2021-03-25 01:26:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 305d1dcd53576fa53f004870b9b186c3 SHA-1: cfc0b65e6774e8ce5e91f1176ba24b273a6e3d8f SHA-256: 1b80dc2c90a0a8ec028a808397bc2c030e4a4e16c81f698b602e7a05a799e9bf
246 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 critical heuristics, including brand-impersonation credential phishing (AMAZON) and ClamAV detection. It contains numerous external links, many pointing to disposable hosting or redirectors, suggesting a phishing or malware distribution scheme. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://tumunuwixa.weebly.com/uploads/1/3/1/3/131384432/4349474.pdf.
  • 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://soxebez.ru/strik?utm_term=night+owl+security+cameras+app PDF link annotation
    • https://cdn.sqhk.co/madufuxenuw/gdhggiu/bejizaperinoxere.pdfIn PDF document text
    • https://tumunuwixa.weebly.com/uploads/1/3/1/3/131384432/4349474.pdfIn PDF document text
    • https://kudiwugeditonaf.weebly.com/uploads/1/3/5/9/135964520/8013928.pdfIn PDF document text
    • http://ighelperscenter.com/kupoxatamiwerisepumeg0ddn3.pdfIn PDF document text
    • http://nazhivy.net/huey_freeman_dancing_gifjipd8.pdfIn PDF document text
    • http://obuv-kozha.ru/the_poky_little_puppy_first_christmas_1973x356n.pdfIn PDF document text
    • https://cdn.sqhk.co/sifajoxojif/igOSKic/football_career_mode_games.pdfIn PDF document text
    • https://wawokosekipazas.weebly.com/uploads/1/3/1/4/131452886/efc8e162f7c1a3.pdfIn PDF document text
    • http://getveran.site/blackberry_sms_tones_freejhk5a.pdfIn PDF document text
    • http://good-production16.site/69184578929qn402.pdfIn PDF document text
    • https://balejumefem.weebly.com/uploads/1/3/0/8/130814467/lejamelesoweb_viwivato_duler_wevugepakogim.pdfIn PDF document text
    • https://wumunelopilum.weebly.com/uploads/1/3/4/3/134395902/dofetarevone-gedimamijikod-rulekonuputuden-gidixoziku.pdfIn PDF document text
    • http://salonhq.xyz/will_there_be_another_diary_of_an_awesome_friendly_kid0w9u2.pdfIn PDF document text
    • http://copyright-help-report.com/why_my_electric_pressure_washer_has_no_pressure6vtcp.pdfIn PDF document text
    • http://oblakova.ru/epson_powerlite_1761w_lcd_projector61dy1.pdfIn PDF document text
    • https://saxenivimagi.weebly.com/uploads/1/3/0/8/130813604/307252a16.pdfIn PDF document text
    • https://cdn.sqhk.co/sawijewabob/ibiiahb/46231160999.pdfIn PDF document text
    • https://watuxiso.weebly.com/uploads/1/3/2/7/132740831/pifejut-nufumabiro-xuzamu-fojidasa.pdfIn PDF document text
    • https://satoteje.weebly.com/uploads/1/3/2/6/132682597/logod.pdfIn PDF document text
    • https://cdn.sqhk.co/vixonafom/gcJcgeP/dizaxov.pdfIn PDF document text
    • http://mugedly.xyz/nonfiction_book_report_outline_templatejs2fm.pdfIn PDF document text
    • https://cdn.sqhk.co/nobutowug/ijxZghb/mega_land_cruiser_for_sale_in_karachi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nozekesarosale.rf.gd/digitech_rp50_manual.pdfIn PDF document text
    • http://gesesasogibigaw.rf.gd/cavatina_guitar_tabs.pdfIn PDF document text
    • http://movetaf.epizy.com/fezowesinokajamasezozavob.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_off0000f9ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CE 5508 bytes
SHA-256: 452dd88b99a9d09e5446258b804ddf468457daac2d2c9b91e4894bca92eb9e25
font_01_sfnt_off00010c89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C89 10360 bytes
SHA-256: 6b5e90f4e52e53ea6a756013063c13e018bd90ff19843e40e4ed2182d0a4abef