Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba88e7c9b4d8c23c…

MALICIOUS

PDF

77.8 KB Created: 2021-03-08 19:39:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6885d6e65601af4f837319811e9d96f2 SHA-1: 223ef50ab09f308fed7ef8d9434917d3d96b1ba5 SHA-256: ba88e7c9b4d8c23c3b80fac0de1995f20a55d11bdbea7287ca9fc918fca83ca5
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant portion pointing to disposable domains and acting as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of external URIs and the link farm heuristic suggest the document's primary purpose is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://bologen.ru/aws?utm_term=what+to+make+with+jelly+roll+fabric PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408984/normal_5fe5a756f2dff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495393/normal_603fbbaf652ad.pdfIn PDF document text
    • http://rodsfish.club/lulezafowojimogonefaln0mv7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454809/normal_5ffa52a95f125.pdfIn PDF document text
    • http://zukirudon.mypressonline.com/wendy_frosty_recipe_dairy_free.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/who_was_the_first_person_to_view_the_walls_of_the_cellar.pdfIn PDF document text
    • http://itdiscount.pro/bachna_ae_haseeno_instrumental_ringtonefns0k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381321/normal_5fd05ba911f62.pdfIn PDF document text
    • http://idealslimitaly-official.site/78976501298s7igb.pdfIn PDF document text
    • http://vuwefedope.sportsontheweb.net/what_are_the_components_of_a_good_news_story.pdfIn PDF document text
    • http://usacarins.com/charting_and_technical_analysis_download1us97.pdfIn PDF document text
    • http://mattelipsticks.site/ayat_ruqyah_full0pnlu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411512/normal_5fcb32d249d84.pdfIn PDF document text
    • http://bumawusuka.mypressonline.com/26509252427.pdfIn PDF document text
    • http://tricitysikhs.com/subway_menu_specials_today_2019b8li3.pdfIn PDF document text
    • http://titanof-filtr.ru/93671569630yp35k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369629/normal_602e15a623714.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446789/normal_60210f4426770.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://liraperuwuw.atwebpages.com/how_to_set_alarm_on_g_shock_5146.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/41954695223.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/66906838666.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/popipexosagugepozesida.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE402 5112 bytes
SHA-256: b259de1b6277371bcd2b1144b192389a0f36cecf5e0f46fd2b7bd4d4573ece11
font_01_sfnt_off0000f58a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58A 11072 bytes
SHA-256: 71379c7fef9c43071a78e94d1bc1bd69054fcf79b9076f1adb3353cb9c4805de
font_02_sfnt_off00011b79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B79 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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