Malicious PDF — malware analysis report

Static analysis result for SHA-256 74b016211825d267…

MALICIOUS

PDF

72.8 KB Created: 2021-09-16 17:21:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7f48ba268497ddd889b0691bd5f60c65 SHA-1: 7183f331ed778026a8bd847929515516faed69c1 SHA-256: 74b016211825d267b617e0c11fdff89601d6b04b01df17376e5d0251eec86cf0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed to host numerous links on disposable domains, a common tactic for distributing malware or conducting phishing campaigns. While no scripts were explicitly extracted, the presence of numerous unknown URLs suggests the document's primary function is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://anhbanglaw.com/userfiles/file/jaligitofegaxudolije.pdf In PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613996c95204b---30394970237.pdfIn PDF document text
    • http://www.smpnuenen.nl/images/files/sajumaninelojiwexakilod.pdfIn PDF document text
    • http://assisdrive.pt/userfiles/file/9683455398.pdfIn PDF document text
    • http://diskacme.dk/images/upload/file/sujoxiwuxanujidemebu.pdfIn PDF document text
    • http://www.ville-dammarie.com/ckfinder/userfiles/files/64505577629.pdfIn PDF document text
    • http://birizgardenhotel.com/userfiles/file/60217751748.pdfIn PDF document text
    • https://trystsalonri.com/images/file/96093342194.pdfIn PDF document text
    • http://actlogistic.vn/upload/editor/files/xelovaboximexaboradupug.pdfIn PDF document text
    • http://bolshunoff.ru/images/wysiwyg/file/pamepapuzov.pdfIn PDF document text
    • http://dallard.fr/ressource/site-image/files/69437406796.pdfIn PDF document text
    • http://snp-ent.com/files/fckeditor/file/409941968613fa7469115e.pdfIn PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/86325556493.pdfIn PDF document text
    • https://jsptti.com/ckeditor/ckfinder/userfiles/files/96935746388.pdfIn PDF document text
    • http://www.clc-engineering.com/siteuploads/editorimg/file/furosikonuwumidonuwes.pdfIn PDF document text
    • http://speakingaboutnetworking.com/ckfinder/userfiles/files/debazotagades.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/82584029346.pdfIn PDF document text
    • http://bekescsaba.varosom.hu/userfiles/files/zilodesuvot.pdfIn PDF document text
    • http://kirilmazbardak.com/userfiles/file/14445130351.pdfIn PDF document text
    • http://come2menorca.com/images/file/rerifoposajub.pdfIn PDF document text
    • http://micronforgacsolo.hu/UserFiles/file/niwudoreresitemejusuni.pdfIn PDF document text
    • https://techlan.pl/files/file/romexalu.pdfIn PDF document text
    • http://heaig.org/editor/ckfinder/userfiles/files/bivuzevatukilamoros.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021090422310873499.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=30+chard+road+brookvalePDF 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_off0000bae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAE2 16544 bytes
SHA-256: ed4f8f3e8c2b12847528c133d5d7ff17fe24b1bcfeb27674b399740d87ec375d
font_01_sfnt_off0000e50a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fd21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD21 10500 bytes
SHA-256: dc645b3b7e60590b68b1b93e640ae71703f67d17276efcb668be52a590cd5765