Malicious PDF — malware analysis report

Static analysis result for SHA-256 d98ed75f17ad34f3…

MALICIOUS

PDF

81.6 KB Created: 2021-03-23 19:04:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: c322b2d673c63aa8c423e761669b6125 SHA-1: c6d666326639fc34d489fcfc161eb12f26a55d3e SHA-256: d98ed75f17ad34f344ae443cd4070ca96f91381450a2a63f026a53fcc4f0144c
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. It contains numerous embedded URLs, with the primary one being `https://xezojetit.ru/123?utm_term=transunion+free+credit+report+sign+in`, which is designed to trick users into visiting a site related to Transunion credit reports. The heuristic `PDF_SEO_DISPOSABLE_LINK_FARM` further suggests a malicious intent to host numerous links on disposable domains.

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://xezojetit.ru/123?utm_term=transunion+free+credit+report+sign+in PDF link annotation
    • http://zitekimuzefovar.iblogger.org/5_love_languages_book_kmart.pdfIn PDF document text
    • http://podemufibe.iblogger.org/what_is_pda_in_theory_of_computation.pdfIn PDF document text
    • https://gejowarog.weebly.com/uploads/1/3/2/7/132740172/7abfbd48cae0.pdfIn PDF document text
    • http://hisgohar.site/juvanovqt0qq.pdfIn PDF document text
    • http://durukogemegaxib.22web.org/ontario_map.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/what_is_the_etiquette_for_mother_of_the_groom_dress.pdfIn PDF document text
    • https://wusedutewaxugag.weebly.com/uploads/1/3/1/4/131437839/bodadogulolez.pdfIn PDF document text
    • http://cmb-accueil.com/26855236254968kp.pdfIn PDF document text
    • http://new-leggins.site/sanden_heat_pump_installation_manual_australiawbo6f.pdfIn PDF document text
    • http://pedaxofanor.mywebcommunity.org/piano_sheet_music_free_online.pdfIn PDF document text
    • http://usesalle.xyz/asiga_pico_2_manualq3qbz.pdfIn PDF document text
    • http://wukilirukorobow.iblogger.org/halloween_worksheets_free_printable.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
    • https://51fd5013-30c4-43d1-89ce-86564632a3b5.filesusr.com/ugd/9f06f8_12885cbf3f6d44529ab5984dc3522ad1.pdf?index=trueIn PDF document text
    • https://d5fb4b5d-766d-4e54-ab1c-ecc61d2b7d82.filesusr.com/ugd/b0c8dc_d8f0b163453f48f3ad9637be60c1ebb4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/allegro_pcb_router_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/fb_video_er_private_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/romeo_and_juliet_dire_straits_meaning.pdfIn PDF document text
    • http://nekipusixewid.epizy.com/54534821561.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/hillsborough_county_school_grade_report.pdfIn PDF document text
    • http://padegijogul.atwebpages.com/70189835872.pdfIn PDF document text
    • https://22520ec4-2132-45a5-98b8-54db1b71d3ea.filesusr.com/ugd/b33b96_c0baded4b40f42a79e7b642644fc0354.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xalasawu/zitilorirotizubalabibog.pdfIn PDF document text
    • https://19508648-7f28-415f-8121-b57715dc1465.filesusr.com/ugd/9734e7_d308baefb20e43119d41be740aa4219c.pdf?index=trueIn 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_off0000f0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F9 5120 bytes
SHA-256: b96333200b174694f22dfc3a6d126fc3999fc330b432595151d97ec17d7a62ad
font_01_sfnt_off0001026a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026A 11392 bytes
SHA-256: 787dd50292615518e92c702d939b7eaef19ebdd50d4b3f1b4829476ad1600267
font_02_sfnt_off000128c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128C2 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34