Malicious PDF — malware analysis report

Static analysis result for SHA-256 5741cb38abd673e4…

MALICIOUS

PDF

83.8 KB Created: 2021-08-25 04:46:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3d5a3654071c21ad223da17e5f67b2f1 SHA-1: e3ebeb28b7c2131f9d637f08db305f174db7a0b0 SHA-256: 5741cb38abd673e46528ad879644e1feb94c7cd73311cff7c788f1b95e14c08f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://coretry.ru/uplcv?utm_term=test+tcp+connection+online PDF link annotation
    • http://hillandbrownfamily.com/clients/76964/File/29139425622.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e2ca93d5581---56119310309.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/51svlcttjmvs0lqvgf1rgnhbbf/fuvirorekoxufakosu.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607261ffcc3bd---16593994987.pdfIn PDF document text
    • https://btsmstlucia.com/atomicsteps/upload/userfiles/file/58989147140.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a12a430c5---63480431482.pdfIn PDF document text
    • http://ukrainski-rosyjski.pl/userfiles/file/23364052171.pdfIn PDF document text
    • https://europawindow.com/app/webroot/img/main_content/files/7193744904.pdfIn PDF document text
    • http://lammensfilip.be/uploads/files/74562646117.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b06d0f95a9e---65525583512.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/zumepujoro.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/22c782c531ab7d4e6e26bc84f4e96de7/tosipadinerojolebapararal.pdfIn PDF document text
    • http://sinproval.it/userfiles/files/kilawomijagebejalusiv.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609fec1db0340---96307284418.pdfIn PDF document text
    • http://logistra.fr/ressource/site-image/files/nexapoboriwulukivo.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/8f67f900ea2775bf9ada6427ecf13887/didumetufo.pdfIn PDF document text
    • https://wecareu.net/ckfinder/userfiles/files/57014010524.pdfIn PDF document text
    • http://alexandersorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/8134024895.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081af7c159e7---tazulabemilosadifukulerav.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607840101751c---2481135032.pdfIn PDF document text
    • https://wipaphun.com/UserFiles/File/dolupuzi.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/63a298b8d3a9ce439ddbae84d81b2df0/bujevomemorigoj.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/jetuxifonogatad.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://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_off0000e71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF34 10068 bytes
SHA-256: 29f6fa8dcedaeee468f422352806474dc9751f77a2b7a6d0f196a6988028dc25
font_02_sfnt_off000115b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B8 16932 bytes
SHA-256: 323817d0d74ea0e3f585718d083e0fce6dddb41ffc7bc015a9d533c76b08aaa3

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