Malicious PDF — malware analysis report

Static analysis result for SHA-256 db76793a1045d8b7…

MALICIOUS

PDF

75.5 KB Created: 2021-03-27 21:59:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: fcb6d38f6febc7d7becb89af6fa6b768 SHA-1: e20cfc2dda138825d020092637fd7555b99a643e SHA-256: db76793a1045d8b72a82c82639a729a080f681f66e39667b925b8c305857567b
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious content. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, appears to be a lure related to medical treatment, likely designed to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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/award?keyword=achilles+tendonitis+home+treatment+pdf PDF link annotation
    • http://tuderoba.getenjoyment.net/40930941556.pdfIn PDF document text
    • https://ruzudagozigiwis.weebly.com/uploads/1/3/5/3/135394236/1276136.pdfIn PDF document text
    • http://keburej.22web.org/29096761956.pdfIn PDF document text
    • http://gokojun.scienceontheweb.net/can_you_feel_the_love_tonight_chords.pdfIn PDF document text
    • http://nulivanofika.mygamesonline.org/fisher_paykel_refrigerator_parts.pdfIn PDF document text
    • http://busimaderule.mywebcommunity.org/zogiviwekolij.pdfIn PDF document text
    • http://muwilagugo.iblogger.org/standard_allen_bolt_sizes.pdfIn PDF document text
    • https://gafalevomunu.weebly.com/uploads/1/3/4/2/134235362/9870398.pdfIn PDF document text
    • https://pakefipeve.weebly.com/uploads/1/3/4/0/134017053/e3896547f8c892.pdfIn PDF document text
    • https://xodobojedabime.weebly.com/uploads/1/3/4/6/134675451/pafewolu.pdfIn PDF document text
    • http://xujofalidubof.iblogger.org/kenmore_series_500_auto_load_sensing_high_efficiency_washer_manual.pdfIn PDF document text
    • http://gimatadokij.mygamesonline.org/journal_of_building_engineering.pdfIn PDF document text
    • http://wulutapebime.getenjoyment.net/cancer_de_cuello_uterino_scielo.pdfIn PDF document text
    • http://sopugepibimel.mypressonline.com/17084089534.pdfIn PDF document text
    • https://bolukuja.weebly.com/uploads/1/3/0/7/130739437/sagano-kolamivor-turogadiluzuji-maxojekadag.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/falufusu/samuxaferabafujol.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/tasajuxefev.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/lavuwalezul.pdfIn PDF document text
    • http://zuxokoberibaw.atwebpages.com/advanced_java_tutorial_for_beginners.pdfIn PDF document text
    • http://jipuxebol.epizy.com/pubufanapirutojem.pdfIn PDF document text
    • http://tawajopawizapa.rf.gd/juleketaxel.pdfIn PDF document text
    • https://s3.amazonaws.com/vinejivunitego/albus_lumen_forma_linen_blazer.pdfIn PDF document text
    • http://zidojupilazado.rf.gd/oregon_state_university_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/excel_sheet_forms.pdfIn PDF document text
    • http://lokunegop.epizy.com/power_cooker_recipes_ribs.pdfIn PDF document text
    • http://robeguf.epizy.com/48850217168.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_off0000eb9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9C 5384 bytes
SHA-256: 96b3fca3fb467cba8568280e5db13a7916aa67f68085e768b0ab6802a4f96d96
font_01_sfnt_off0000fdc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC0 10168 bytes
SHA-256: 27bf0898427758116f96d57f3a0a3ea01e373d9f86d8c8cbd3af4a18eeeffdba

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