Malicious PDF — malware analysis report

Static analysis result for SHA-256 51c5af4357c47fc9…

MALICIOUS

PDF

73.8 KB Created: 2021-03-12 20:08:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 835e3760eacc665b5646a985d95c4f53 SHA-1: 41a930d3f27d264f1d3497742a4d89b3e7896731 SHA-256: 51c5af4357c47fc9a0856dde54ab90536167a6cbec7152d5d8e3f83b9145fd0a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are used in a link farm pattern, suggesting a phishing or scam attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of 'utm_term=fill+out+check+template' in one of the URLs strongly indicate a lure to trick users into clicking through to potentially malicious content. Although no scripts were explicitly extracted, the overall structure and URL distribution are characteristic of phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://lozipotod.ru/123?utm_term=fill+out+check+template PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408721/normal_60272b76da483.pdfIn PDF document text
    • https://cdn.sqhk.co/sezepemanu/tgfjfhb/turbo_kit_for_toyota_tacoma.pdfIn PDF document text
    • https://lomizagufefeg.weebly.com/uploads/1/3/4/0/134096038/8ff8c6c.pdfIn PDF document text
    • https://cdn.sqhk.co/wasefago/gZ9XIrI/94483278680.pdfIn PDF document text
    • http://joweponula.mywebcommunity.org/what_is_starcraft_hd_vinyl.pdfIn PDF document text
    • http://topshops.website/52875568886tf8it.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384028/normal_5fe0d29caed27.pdfIn PDF document text
    • http://reznitskygallery.com/english_vinglish_full_movie_hdkmnvs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443329/normal_5ffc5958c4cf3.pdfIn PDF document text
    • http://good-production17.site/how_to_download_matrix_live_wallpaper_for_iphonec8mpe.pdfIn PDF document text
    • http://lisolu.org/jandy_lrz_pool_heater_troubleshooting_guidelcp12.pdfIn PDF document text
    • http://brumbum6.xyz/81805859964geq11.pdfIn PDF document text
    • http://rigoditibalun.mywebcommunity.org/how_to_add_camera_to_summer_infant_monitor_wide_view_2.0.pdfIn PDF document text
    • http://gagivukamuw.getenjoyment.net/honda_1000_generator_oil_filter.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412413/normal_5fe740d175ff7.pdfIn PDF document text
    • http://lalat.space/jilanezumufibiwufokuvjxow.pdfIn PDF document text
    • https://xexafuru.weebly.com/uploads/1/3/1/0/131070851/soramifuborujag_gibunazufogo_surivi_kirip.pdfIn PDF document text
    • http://biwedujurar.mywebcommunity.org/pantone_the_twentieth_century_in_color_review.pdfIn PDF document text
    • http://classkaod.ru/nivovevezaxokamukenedojo57s92.pdfIn PDF document text
    • http://bit7.top/28661268403i1dqr.pdfIn PDF document text
    • http://supportcopyright.net/cetoacidosis_diabetica_fisiopatologia_pediatria9d2w0.pdfIn PDF document text
    • http://card2card-perevod24.site/will_tales_from_the_loop_have_a_season_214y83.pdfIn PDF document text
    • https://viwosexoteb.weebly.com/uploads/1/3/4/6/134631328/kupotijufemosenepetu.pdfIn PDF document text
    • https://besumexuzeju.weebly.com/uploads/1/3/4/6/134646316/7a495c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e4fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FB 4916 bytes
SHA-256: af6c42b9be78fb2684256f6f2723201a306acc40da38b19620b52d1f5492b7ae
font_01_sfnt_off0000f590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF590 10728 bytes
SHA-256: eb0c6568ff46ed73006762177cae9d32e0b3d529a28e2f14ab4a601e4f6ce31a

Open this report in the interactive analyzer, or submit your own file for analysis.