Malicious PDF — malware analysis report

Static analysis result for SHA-256 056034e342583f4f…

MALICIOUS

PDF

68.3 KB Created: 2021-10-06 19:01:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 85392029a1a43c26acee174da5a27292 SHA-1: 3633b4cc52ad24348713f19c1c1bdcc7a88f857b SHA-256: 056034e342583f4fb708a253c48910c5f225bf11d162dcf60e6bdafa4870d71b
146 Risk Score

Malware Insights

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

The PDF was identified as malicious by ClamAV and a machine learning classifier, exhibiting characteristics of a phishing lure. It contains numerous embedded URLs, many of which point to potentially disposable hosting, suggesting an attempt to distribute malicious content or redirect users to phishing sites. The heuristic 'PDF_IMAGE_LURE' indicates the document likely presents as an image to obscure clickable actions, a common tactic for phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/69fb857211edbb991554a0b55b06ce02/niravonajiwuvodavitufep.pdf In PDF document text
    • http://portakalweb.net/home/portakal/public_html/ckfinder/userfiles/files/lizirulojekujosofojepuva.pdfIn PDF document text
    • http://tacchigroup.com/public/thread/risorse/file/vepiritewujipuwoboxidap.pdfIn PDF document text
    • http://fd-health.com/upload/ckeditor/files/76559297784.pdfIn PDF document text
    • http://cainghienbinhduong.com/uploads/userfiles/file/58770228862.pdfIn PDF document text
    • http://uhy-th.com/image/upload/files/panera.pdfIn PDF document text
    • http://fotografoenricogiampieri.it/userfiles/files/20633739978.pdfIn PDF document text
    • https://tunguoilon.tunhua.vn/ipp/images/uploads/files/24780076631.pdfIn PDF document text
    • http://sromedical.com/file_media/file_image/file/nedodetuzuwunozifenapubi.pdfIn PDF document text
    • http://arc-en-cielproduce.com/ckfinder/userfiles/files/5411308423.pdfIn PDF document text
    • https://tuoitre.bacgiang.gov.vn/lib/ckfinder/files/48238606766.pdfIn PDF document text
    • http://wccflooring.com/userfiles/files/loviramujobivo.pdfIn PDF document text
    • http://edmo-cars.nl/images/file/21081146545.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16140eb741a735---45594187315.pdfIn PDF document text
    • https://kvizek.hu/ckfinder/userfiles/files/84126722471.pdfIn PDF document text
    • https://sdhouse.info/ckfinder/userfiles/files/moteladut.pdfIn PDF document text
    • https://ismet.com.br/ckfinder/userfiles/files/fafenuluko.pdfIn PDF document text
    • http://tinhdauvietnam.vn/upload/files/rumadigevigosumeta.pdfIn PDF document text
    • http://smeeing.com/userfiles/files/87734274726.pdfIn PDF document text
    • https://europartner2.pl/uploads/1129534503.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/15035162571.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=path+of+endurance+diggy%27s+adventurePDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c75c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC75C 11024 bytes
SHA-256: 7f76d06f6e7e783899ef5bb34ced8e5a6605a4eec68e30abbdbd7336c54caba2
font_02_sfnt_off0000e0da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DA 14036 bytes
SHA-256: b39b2beab6a651e3d1cc6edac115ff0f7f79235ad479f709300a70bbb17ab424