Malicious PDF — malware analysis report

Static analysis result for SHA-256 baad8d7b75e8a99f…

MALICIOUS

PDF

76.3 KB Created: 2021-04-06 13:40:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0ad2c3b316f393d87a322b8f6a5909fc SHA-1: 55a3699722fd3c2a27944a061569bb1be90920a4 SHA-256: baad8d7b75e8a99ff1acfb16939e23139b298c1b670c644a75e13d004f59c098
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 0.9991

Heuristics 5

  • 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 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://leonvi.ru/123?utm_term=calendar+math+worksheets+grade+2 PDF link annotation
    • https://cdn.sqhk.co/letarezetap/CKsihKb/40504930244.pdfIn PDF document text
    • http://xuroriwonufuz.scienceontheweb.net/pegejekabukiveno.pdfIn PDF document text
    • https://cdn.sqhk.co/sejixikerut/W66rjh4/44304031114.pdfIn PDF document text
    • https://cdn.sqhk.co/pikuresob/zididja/38004024124.pdfIn PDF document text
    • https://cdn.sqhk.co/kogewole/coge8mo/space_race_board_game_rules.pdfIn PDF document text
    • http://juwoniki.getenjoyment.net/23921606510.pdfIn PDF document text
    • http://keep-travel.com/16514789643y4rp.pdfIn PDF document text
    • http://novofikupeneda.mywebcommunity.org/monodentate_ligands.pdfIn PDF document text
    • https://cdn.sqhk.co/tenokesime/eTjamgi/best_ringtones_for_android_free.pdfIn PDF document text
    • https://cdn.sqhk.co/tivuzofep/6he63dd/happy_chef_chinese_wallsend_menu.pdfIn PDF document text
    • http://merotudonor.mypressonline.com/enterprise_risk_management_notes.pdfIn PDF document text
    • https://cdn.sqhk.co/zidodovare/kjbhd8K/34444132442.pdfIn PDF document text
    • https://cdn.sqhk.co/zurefaxenov/jaijidR/76119960011.pdfIn PDF document text
    • https://cdn.sqhk.co/rozesivotix/jdSticD/virus_hunter_island_cheats.pdfIn PDF document text
    • http://dusejetiwogodad.getenjoyment.net/the_fall_of_berlin_1945_antony_beevor.pdfIn PDF document text
    • http://retapadu.medianewsonline.com/icao_annex_13_10th_edition.pdfIn PDF document text
    • http://keto-s1.com/english_reading_comprehension_test_a2xj7v6.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/8Jspif3/16601324962.pdfIn PDF document text
    • http://mmeueue.space/beautiful_flower_house_images7pcvf.pdfIn PDF document text
    • http://vexasefagi.scienceontheweb.net/animal_anatomy_books_for_artists.pdfIn PDF document text
    • https://cdn.sqhk.co/zalivelo/hd3hjhd/wedepetunifekixe.pdfIn PDF document text
    • http://vevovifox.scienceontheweb.net/79392148364.pdfIn PDF document text
    • http://zuduwamani.mypressonline.com/acute_surgical_abdomen.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mubodadekutaxim.atwebpages.com/pdf_editor_windows_free_download.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_off0000ec3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3B 5432 bytes
SHA-256: 47b4ef81833c9a21aeee450cc2c715695ce09bdd7bda9c964dfe99ad5eddf411
font_01_sfnt_off0000fe96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE96 10700 bytes
SHA-256: fa97724eb60ce00698405c406694e49a471e908e94b7f93bf2eebeb41197c84d

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