Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e4db6f546010221…

MALICIOUS

PDF

69.8 KB Created: 2021-02-16 05:31:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 789d4097bd7331f90b1599d22abfece5 SHA-1: 2b4a3f6c985eea357e1c93039f8b12a510857a2f SHA-256: 6e4db6f54601022147880d0e283571f2e9ebff3786396f1e38048ad639ca2240
256 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://letezinujafi.weebly.com/uploads/1/3/4/9/134901841/4589867.pdf.
  • 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://bologen.ru/wix?keyword=sum+of+arithmetic+sequence+worksheet PDF link annotation
    • http://questotzvezd.space/romaxakepu4z4d0.pdfIn PDF document text
    • https://letezinujafi.weebly.com/uploads/1/3/4/9/134901841/4589867.pdfIn PDF document text
    • http://xinupavob.iblogger.org/33433643976.pdfIn PDF document text
    • https://cdn.sqhk.co/vixuwegijelo/gggicah/battlefront_2_report_player_ps4.pdfIn PDF document text
    • https://vikumufum.weebly.com/uploads/1/3/1/3/131398575/5987614.pdfIn PDF document text
    • https://cdn.sqhk.co/kajipazuto/JheTwhc/37651533620.pdfIn PDF document text
    • http://boxberry-24.cc/kmspico_windows_7_ultimate_64_bit_dowxku7.pdfIn PDF document text
    • http://vanlit.ru/como_cargar_saldo_gratis_claro_argentinaozziv.pdfIn PDF document text
    • https://bixarina.weebly.com/uploads/1/3/1/0/131069915/4da6919ba196ff.pdfIn PDF document text
    • https://cdn.sqhk.co/sozasusu/ihgi0jd/29023631685.pdfIn PDF document text
    • https://cdn.sqhk.co/bidogefapo/ciazUhc/gaming_wallpapers_pc_download.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/gelawiweza/baby_boy_cute_images_free.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/bullet_bike_wallpaper_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/70419068723.pdfIn PDF document text
    • http://boparozib.rf.gd/organic_bed_sheets_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/laminate_countertop_sheets_installation.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/96080847144.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/91396713630.pdfIn PDF document text
    • http://godavuvexo.epizy.com/freshers_core_java_interview_questions_and_answers.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_off0000d21a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD21A 5476 bytes
SHA-256: 3b5ca91ea89ffc8ac9fdabdbad31868582bbec08294eabb206a3d79c54c0feca
font_01_sfnt_off0000e4a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A6 10968 bytes
SHA-256: 0b39132205a8bc73406e2e967531d483f23c47ddb6176fd79c9badd543864c3e

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