Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9adc6ed63cd3c3d…

MALICIOUS

PDF

79.4 KB Created: 2021-03-02 18:45:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: feab4e5709730b14388b6cf810a611e7 SHA-1: 6f35bb8908e12efc3f9b3821ca33af74cafa0911 SHA-256: c9adc6ed63cd3c3d2782301936b8bf33c8e9ecb965213d98c494de65a700eeff
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://dugedepap.ru/strik?utm_term=mejores+libros+sobre+economia+y+finanzas PDF link annotation
    • http://sarhello.online/daydreamer_song_lyricsiwyu6.pdfIn PDF document text
    • http://shopsupergood.site/free_autism_stuff_2020_uk8yja6.pdfIn PDF document text
    • http://nitesufi.sportsontheweb.net/14661929502.pdfIn PDF document text
    • http://xawamiwupajev.mygamesonline.org/8497008367.pdfIn PDF document text
    • http://leseweremizew.scienceontheweb.net/substitution_effect_for_perfect_substitutes.pdfIn PDF document text
    • http://radanews.site/73997596863n6py3.pdfIn PDF document text
    • http://brandframeb.com/chamma_chamma_new_song_video_tinyjukepu0nq.pdfIn PDF document text
    • http://new-leggins.site/bazekulif4mrbs.pdfIn PDF document text
    • http://opencabinets.xyz/feletadupikomaserofozoij18.pdfIn PDF document text
    • http://bodyita.space/94151734874nimf7.pdfIn PDF document text
    • http://matteset-spon.space/nikon_dx_55-200mm_camera63dzs.pdfIn PDF document text
    • http://dajexori.mypressonline.com/pfaff_sewing_machine_instruction_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://satawakerexe.atwebpages.com/12727451595.pdfIn PDF document text
    • http://pojozija.onlinewebshop.net/simplex_4100_service_manual.pdfIn PDF document text
    • http://wejajesenopezoj.onlinewebshop.net/63692086990.pdfIn PDF document text
    • http://joxedebonod.rf.gd/bsa_sweet_22_6-18x40_review.pdfIn PDF document text
    • http://sobupedu.rf.gd/dupanonagom.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_off0000f564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF564 5400 bytes
SHA-256: aca603e19b0307f3f2b75894cc7f42d776e5e6ff9c25ca2b4b94d230af97190d
font_01_sfnt_off000107cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CD 11896 bytes
SHA-256: f65337134d090e5274447e3fb90e9ecc652989c751f12d92bbeb27d84a12bbb2