Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeb28ce9399df33c…

MALICIOUS

PDF

76.2 KB Created: 2021-07-26 10:04:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d743cbfdb7ae732ec655367a6b02a354 SHA-1: a1b8b434eeaf8b9b771e28b7594223f78eb6c6b1 SHA-256: eeb28ce9399df33c8dfd05f42cabc15bee8f5cd034d14b7e8382e7952fbf9bc6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS upload directories, suggesting a link farm designed to distribute malicious content or phish users. While no scripts were explicitly extracted, the nature of the embedded URLs and the 'link farm' heuristics indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b7685754239---razuwozilaxesunopadonokan.pdf In PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/92559011963.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607a377963969---sikerediponi.pdfIn PDF document text
    • http://old.arcnet.org.tw/ckfinder/userfiles/files/nilewisajopirojetizasex.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/535fd3f62603fb90de326e22e9ed1c95/bujebekomomufada.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/f3c9c14ed8e0d482985b5a53974d5546/35175060225.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16090ab539fed8---tokoram.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/18476500968.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/1ca7496f6af0e65f125313fa6f4ed72f/gulutosobigomi.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/fb4295b92f8efbee63ffbe84b2885e25/fipubogoxelinorixun.pdfIn PDF document text
    • https://jdlpartnerss.com/userfiles/file/petosa.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a659d88ea82---fosufuli.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/4b74ceb8a632ff81f11c4b3f04ed2374/duxaxa.pdfIn PDF document text
    • http://giustizianuova.it/userfiles/file/4593612388.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/4vaj7rgo1nvvvte6fnq9b8ocig/21217838774.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/4e88b9a28479c0b0ec55645e3d93bd5a/7179066344.pdfIn PDF document text
    • http://klubbelgickychobrov.sk/editor_uploads/files/rafusimopo.pdfIn PDF document text
    • http://amsaneeraus.fi/userfiles/files/gejaziwadalatu.pdfIn PDF document text
    • http://abwferrellpkwy.com/uploads/files/81314462742.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160848a378d8d2---25044070506.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/xesubemifar.pdfIn PDF document text
    • http://tnslib.net/userfiles/files/82154953263.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/zosaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+program+a+dish+tv+remote+controlPDF 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_off0000c821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC821 11104 bytes
SHA-256: d6761903370a7ca7356e85c2021706af3766132ee09c1ee1536bf49d38af32ea
font_01_sfnt_off0000e1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f9c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C5 16136 bytes
SHA-256: d9296f4a4ff5ea5c2ee85340bc88a9df7996d59d670da5c8c05ac0c01e2c3d96

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