Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2e7eab951c6c612…

MALICIOUS

PDF

79.5 KB Created: 2021-05-04 01:12:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9460750c5533983701ca816d814e63a7 SHA-1: dababa9b7e3d126bef22b7e6b7deba97489643e3 SHA-256: a2e7eab951c6c612998c0aa2ff969121eb90337cc3094da5aa096e490c2ce119
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 0.9996

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://bologen.ru/strik?utm_term=proform+hybrid+trainer+elliptical+assembly+instructions PDF link annotation
    • http://voiprormul.xyz/bengali_movie_sultan_all_video_songeo1sd.pdfIn PDF document text
    • https://cdn.sqhk.co/tijinujul/djmHEjb/etisalat_business_super_application_form.pdfIn PDF document text
    • https://cdn.sqhk.co/tawavumazo/gjdgcnh/44950655847.pdfIn PDF document text
    • http://folejaf.mypressonline.com/japan_calendar_2020_holidays.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://cdn.sqhk.co/merabuvi/xK6Lfji/58704074412.pdfIn PDF document text
    • https://cdn.sqhk.co/fipexuwebo/CggghJg/background_blur_app_android_free.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/jhKidhf/best_game_creator_software_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/baxajufim/m06jgja/traffic_crash_investigation_northwestern_university.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • http://kanaxade.mygamesonline.org/16511262942.pdfIn PDF document text
    • https://cdn.sqhk.co/numiwuzuwix/gib8L0J/nuzugop.pdfIn PDF document text
    • http://italywow.pro/449384639954cbps.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/cfpb_hmda_guide_to_getting_it_right.pdfIn PDF document text
    • http://zokaramizixa.atwebpages.com/66437120045.pdfIn PDF document text
    • http://wuwerodewepejij.epizy.com/mekanisme_terjadinya_pingsan.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/83329758291.pdfIn PDF document text
    • http://fisejotigu.epizy.com/losamomebup.pdfIn PDF document text
    • http://kegigija.atwebpages.com/walgreens_online_job_application.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/dekabodivu.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/90304397822.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/80259181190.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_off0000f6c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C8 5640 bytes
SHA-256: dbadfb17ef4806d9cc9526dd96c5a09e79735f99e4ffbac732b54a40493f019a
font_01_sfnt_off000109cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109CB 11184 bytes
SHA-256: 079f5d959d8ab754cfb93e9b3b7ba99b89c1359d86539344ee1d9431866fefc9

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