Malicious PDF — malware analysis report

Static analysis result for SHA-256 b103a3c5eede9b7d…

MALICIOUS

PDF

90.1 KB Created: 2021-07-13 13:09:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 8ffbd4293934623c69c31111481a1814 SHA-1: 78414a2bf603249960a96dac652a85e3cb8c76bb SHA-256: b103a3c5eede9b7d7788d69e44a62c40cecb33aa475f742b48ae0de09712431d
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3632

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
  • 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
  • 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://rainbowcaterers.in/userfiles/file/59359574711.pdf In PDF document text
    • http://tunglamgarden.com/images/fck/file/83999772621.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/11926377632.pdfIn PDF document text
    • https://umartravel.com/files/mebogaziliduzog.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd16d47dca---zeguvarifeviwonamixev.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/vizosabugibofot.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a251fd217e8---sajoponagudodudawulugorej.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/afcf8b41369599180ab1dda3c3468072/31114141325.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/81716517943.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/livefatafosa.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/cfa0df8814be201df799e8f6ee8369a2/98526243831.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/bodoxunavupofibululaladix.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944ed4a316c---92773847015.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/1p14vb3sbj4kf8rp2eiij0r0ur/27471064139.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1c6120c40---dexodozogozor.pdfIn PDF document text
    • http://ridendo.cz/files/file/95190078748.pdfIn PDF document text
    • https://secolink.sk/userfiles/file/7656117544.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfdb35a4fd9---tekojoribexabug.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c0c9a16fa---namoragatulu.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d015badfc06---tonugam.pdfIn PDF document text
    • https://hoangnhataudio.vn/media/files/29746314220.pdfIn PDF document text
    • http://dagmare.de/userfiles/file/8063179498.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/6839201778.pdfIn PDF document text
    • http://csaladiegyteruautok.hu/userfiles/files/74340462074.pdfIn PDF document text
    • https://smilepaper.tw/archive/upload/files/75897796952.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=cbse+sample+paper+2020+class+10+science+with+solutionPDF 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_off00011dec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DEC 11292 bytes
SHA-256: 2639150c700ba8d30f1ed0d267ab8ba77440bc79087f97dd66d26cab58a60552
font_01_sfnt_off0001382d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1382D 16884 bytes
SHA-256: cc2a3f3479d3bee70661eb60f78e5b2c0133aec4a7ecc4f2e1b8e5ccae90ed04

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