Malicious PDF — malware analysis report

Static analysis result for SHA-256 00d70530c9f111a9…

MALICIOUS

PDF

81.0 KB Created: 2021-08-12 08:58:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2cc6550cf38e28f1ffeaaf91a624c990 SHA-1: f4a3123c8bb74d45745b026e1449faba2f1691dd SHA-256: 00d70530c9f111a95d25746b8eed7224e759a7e3ca4ef685dd386fe9e9005172
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to numerous compromised WordPress sites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The document body is heavily obfuscated and unreadable, but the presence of many external URIs, some hosted on compromised CMS uploads, supports the link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6637

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://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608e2f926cf7b---wowiwoxadufexozulomexa.pdf In PDF document text
    • http://newtarrytowndeli.com/uploads/files/17835674340.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/bf117d80179261a48d267aae6e279a16/lajigupuvozarexega.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d09d67a16---96718500226.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/75250668938.pdfIn PDF document text
    • http://theettiaresottawa.ca/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/50567010594.pdfIn PDF document text
    • http://artside.org/data/temp/file/64321587793.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c45553cba43---86264830783.pdfIn PDF document text
    • https://lmbri.com/WYSIWYGImage/file/84224481193.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/36592792370.pdfIn PDF document text
    • http://whatifitspossible.com/ckfinder/userfiles/files/jikivozerujaduj.pdfIn PDF document text
    • http://briarcliff70.com/clients/874901/File/97687581232.pdfIn PDF document text
    • http://dejede.com/userfiles/file/1403767316.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/werefibuvoretugiretuziv.pdfIn PDF document text
    • http://sampsonancestry.com/clients/d/d9/d9bd9208c4e45de01aa31840e3a8c66b/File/menosaturumewij.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/29ef2d1aa4dd421852d3c10bbeac35cf/soxanavafid.pdfIn PDF document text
    • https://triosms.com/userfiles/file/77830610640.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/r85gbag6anqk1ig0qph52e4og0/48288474549.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16071dbed8d466---nepuromewukosapusajuzizi.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/da73bff4f22f2bd0bd221ad2ee9f432e/41597278171.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/bcb25fb9e5051f295b8ecaef6d3c1b24/47840801391.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/c7pnaehvtkqth5j31b61js7hdk/lazedejex.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a99f43734f2---nirifebosoxizufuwimumukel.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a370e790e2171339534274bcc0a5f286/demubonufuzasozuvefitu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=academic+journal+guide+2018+pdfPDF 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_off0000f488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF488 18736 bytes
SHA-256: 71da54912b77ebd15268ec06d091399637a9f447562c6f14ce6f71f89695089b
font_01_sfnt_off00012563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12563 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1