Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee028f09b3dc8e82…

MALICIOUS

PDF

95.0 KB Created: 2021-03-04 07:16:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5dab8f5ae79705e22848ec0e82fce65c SHA-1: 8ea5307957b2337e7a8469563bdee200202666b0 SHA-256: ee028f09b3dc8e821ea34af06586fcaebc76e95cf6c53cea801895e134d8c5d1
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://botokaw.ru/123?utm_term=do+aasimar+have+darkvision PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4445125/normal_5fcdb4197a30f.pdfIn PDF document text
    • https://cdn.sqhk.co/jobiwokojo/M7ekidL/sonny_and_cher_i_got_you_babe.pdfIn PDF document text
    • https://tisawotaw.weebly.com/uploads/1/3/5/9/135993845/31440868a5fb3e.pdfIn PDF document text
    • http://rujisuki.mygamesonline.org/white_christmas_tree_ornament.pdfIn PDF document text
    • https://rimimasosonajis.weebly.com/uploads/1/3/2/6/132681992/767ae68ad.pdfIn PDF document text
    • http://nopotaz.medianewsonline.com/disodefexafali.pdfIn PDF document text
    • http://daludaja.getenjoyment.net/32596411858.pdfIn PDF document text
    • https://muxasikij.weebly.com/uploads/1/3/1/8/131872285/8244355.pdfIn PDF document text
    • http://lenuvivureropi.scienceontheweb.net/mamekuzuxe.pdfIn PDF document text
    • http://topukovatawosu.sportsontheweb.net/tilidutedalaw.pdfIn PDF document text
    • https://cdn.sqhk.co/nemoludajedu/uiFjhXt/omega_xl_reviews_amazon.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/lg_lp0815wnr_exhaust_hose.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vujuvisesakok.myartsonline.com/washington_redskins_schedule_2021.pdfIn PDF document text
    • http://xiniwipilanaju.atwebpages.com/bulofisarozudarabosag.pdfIn PDF document text
    • http://pelebirepopo.onlinewebshop.net/ronisivuronuforikol.pdfIn PDF document text
    • http://rixigor.onlinewebshop.net/swiffer_wet_jet_nozzle_not_spraying.pdfIn PDF document text
    • http://tavamikilav.myartsonline.com/what_is_scientific_social_research.pdfIn PDF document text
    • http://doriponesarom.myartsonline.com/what_is_the_importance_of_potential_and_kinetic_energy_in_our_daily_life.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_off000136c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136C4 5156 bytes
SHA-256: 594ac4ede6b4c1b826ccf10de1275dd991d8d79da179882af49965cb9f30842a
font_01_sfnt_off0001482d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1482D 11524 bytes
SHA-256: dd7914827022aad06873337d66030b2b81223e9d60eaf816050a072da07c6d9c