Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e7e55500ea1c317…

MALICIOUS

PDF

83.7 KB Created: 2021-03-17 02:52:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c911391e5bc583024dead358fa44f997 SHA-1: 106114ce6a32745e7bca02166a7f301b8f0be32d SHA-256: 3e7e55500ea1c31790aea19a51e8ad8cba5833b8fa1f189c209de3989b0988fd
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 0.9997

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://mezovuduw.ru/strik?utm_term=how+to+write+a+case+study+in+social+work PDF link annotation
    • http://jarokixepoweso.mypressonline.com/45591166766.pdfIn PDF document text
    • http://mufosubofamar.mywebcommunity.org/warcraft_2_full_movie_in_hindi_dubbed_download_filmyzilla.pdfIn PDF document text
    • http://xodaxedepapopox.mygamesonline.org/43672307147.pdfIn PDF document text
    • http://terugate.mypressonline.com/dragon_age_origins_unlock_all_dlc_items.pdfIn PDF document text
    • http://bebetadiruj.mywebcommunity.org/20522643725.pdfIn PDF document text
    • http://lovupijuti.getenjoyment.net/satixevazex.pdfIn PDF document text
    • http://vexasefagi.scienceontheweb.net/gesotojel.pdfIn PDF document text
    • http://vijufik.iblogger.org/52349392010.pdfIn PDF document text
    • http://dawexefif.getenjoyment.net/34372815895.pdfIn PDF document text
    • http://rejorevubirobu.sportsontheweb.net/etymological_meaning_of_education.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pudolajuji.atwebpages.com/katojibuwinalegofol.pdfIn PDF document text
    • http://xovurilarilowi.epizy.com/business_studies_past_papers_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/angiotensin_ii_receptor_blockers.pdfIn PDF document text
    • http://netupabajezi.rf.gd/nevijamazidibetuvavorino.pdfIn PDF document text
    • http://jozobudesurarab.onlinewebshop.net/xobolavizil.pdfIn PDF document text
    • http://namepafubi.atwebpages.com/sosiniwebiniluvimejabug.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/what_is_narrative_perspective_in_literature.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/estructura_de_la_celula_bacteriana.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/suxuzofitusumavug.pdfIn PDF document text
    • http://sasukagisodubex.onlinewebshop.net/build_my_life_worship_song_lyrics.pdfIn PDF document text
    • http://betakudo.atwebpages.com/induction_motor_speed_control_methods.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_off00010989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10989 5152 bytes
SHA-256: 2858cd160e0effd81a6d7b547019889f3df1c9e026f0d45720f46e1fb5bf2711
font_01_sfnt_off00011b2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B2F 11304 bytes
SHA-256: d072b573d07d1a47c48e357b5ad6f39b7adbac2073a867f9901ab0e911c47044