Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eb8ea8f7bfb721d…

MALICIOUS

PDF

87.4 KB Created: 2021-09-13 01:52:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 2ac85585a0a4bed26d3292a7bec70d80 SHA-1: 8c5eab24a7c254ccd8f08cfaba240ee9912a3d7c SHA-256: 1eb8ea8f7bfb721d68f2c3e843d577a5b0ce46aa72d58333fc90c950c401cc9b
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as 'Pdf.Phishing.Trojan'. It contains numerous embedded URLs, many of which point to disposable domains and are structured as a link farm, a common tactic for phishing or distributing malware. While no scripts were explicitly extracted, the PDF structure and the nature of the URLs suggest an intent to lure users to malicious sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier clean score 0.1617

Heuristics 4

  • 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
  • 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://mimpisiluman.com/contents/files/bugosufuwi.pdf In PDF document text
    • http://thaoduocquyhiem.com/userfiles/image/file/vajimolokulu.pdfIn PDF document text
    • https://inprovit.com/ckfinder/userfiles/files/mubogomaratopisumi.pdfIn PDF document text
    • http://dichvugiayphep.biz/upload/ck/files/loviv.pdfIn PDF document text
    • http://daiichihr.com/uploads/news_file/raziz.pdfIn PDF document text
    • https://fundacjanadzieja.com/images/wyswig_images/file/10439252872.pdfIn PDF document text
    • http://logopeda-empatia.pl/content/file/wudawomu.pdfIn PDF document text
    • http://wahluenfty.com/userfiles/zapofo.pdfIn PDF document text
    • https://spandoekland.nl/userfiles/file/bonideka.pdfIn PDF document text
    • https://kham.vn/userfiles/file/93328549962.pdfIn PDF document text
    • http://carrasvilla.es/uploads/files/3340624277.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161320b93c5a00---luwiwivukel.pdfIn PDF document text
    • http://virus-safe-zone.com/ckupload/files/43598038194.pdfIn PDF document text
    • https://handinhand-daycare.com/ckfinder/userfiles/files/58111016548.pdfIn PDF document text
    • http://xn--aknmedical-yub.com/uploads/file/39028701839.pdfIn PDF document text
    • http://avanti.pl/userfiles/file/jemojezura.pdfIn PDF document text
    • http://flapboxes.com/userfiles/files/86196762444.pdfIn PDF document text
    • https://mahanakhon.pacedev.com/ckupload/files/30455338392.pdfIn PDF document text
    • http://hotelniagararimini.eu/userfiles/files/kakif.pdfIn PDF document text
    • http://richardchong.com/userfiles/files/23895303708.pdfIn PDF document text
    • http://lamarchesainterita.be/lamarchesainterita/imgdb/news/files/78101032701.pdfIn PDF document text
    • https://escolaalfa.com/userfiles/file/41467575040.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/1af690c70e7134d0f757ee3c2c80c2ec/xesizetapixekidafe.pdfIn PDF document text
    • http://yourmoneyyourbank.com/uploads/File/kufizonepadagetemebi.pdfIn PDF document text
    • http://kunbot.com/upload/files/fufuvunejesagogupesoto.pdfIn PDF document text
    • http://naplesredeals.com/userfiles/files/70603584368.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=the+unwinding+george+packer+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109FA 10828 bytes
SHA-256: a1b8387493a1d49d484461500d45b2f5b6085bc61f38d4cb5dc37876b27c04b3
font_01_sfnt_off000122b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B1 17952 bytes
SHA-256: e79ce01817a4fc9a992685a01adf6c95fbb8f1d1fd6abaddcb6eb0f27aa1d8a1

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