Malicious PDF — malware analysis report

Static analysis result for SHA-256 2911be31b3947140…

MALICIOUS

PDF

70.6 KB Created: 2021-02-19 02:36:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8d562677502e972b747d770afffed300 SHA-1: 75e501b44ae4ad485884bb62b832529ac5181f9a SHA-256: 2911be31b39471409b1c17d5e931b7a0b4986861000c1da7d5dc96385694869d
186 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.
  • 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://bologen.ru/wix?keyword=modern+biology+textbook+answers+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481520/normal_5fd2a55526795.pdfIn PDF document text
    • http://test123test.xyz/32321501225or0io.pdfIn PDF document text
    • https://moxiwomalupul.weebly.com/uploads/1/3/4/5/134598527/dotutifefevopulune.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417325/normal_5fdd93ca42c8f.pdfIn PDF document text
    • http://kutakelipaxeb.22web.org/84116983866.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzezajolu/Bge3gdR/cross_wallpaper_iphone_8_original.pdfIn PDF document text
    • http://vamoktin.ru/migagowomixikofb01a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465393/normal_5fd17e76ad9c9.pdfIn PDF document text
    • https://kosilamegorigi.weebly.com/uploads/1/3/1/4/131409210/wutitixamo.pdfIn PDF document text
    • https://lemapemoj.weebly.com/uploads/1/3/4/0/134040436/noxogolupat_peburujip_rosuwizufupo_dakiwuvixadituz.pdfIn PDF document text
    • http://rubeatyshop.xyz/free_monthly_calendar_templates_2019vlehu.pdfIn PDF document text
    • https://sowotelimavo.weebly.com/uploads/1/3/4/0/134000290/vodadukide.pdfIn PDF document text
    • https://bolifalaloken.weebly.com/uploads/1/3/1/4/131438202/parakar.pdfIn PDF document text
    • https://gedinabudi.weebly.com/uploads/1/3/0/8/130814056/tukisonuko-vivabifubaroz-najupatizize-tokesejaxe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://magajavopisili.epizy.com/fowotuvexabolujetederebe.pdfIn PDF document text
    • http://girodolud.rf.gd/latam_2_letter_airline_code.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_off0000d5a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A3 5680 bytes
SHA-256: 75519db482c14fea94b0bef5dbc1ea1d0cb4396375305e2e4cd869e376b777bc
font_01_sfnt_off0000e931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE931 10616 bytes
SHA-256: 12cf89218dafb68921a99b5a7602fdf4d56939614916c154517df8c8c62218a6

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