Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf2f20e7d01c59a4…

MALICIOUS

PDF

76.5 KB Created: 2021-08-20 02:43:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d03dcb5cdc5e0ccceddd1eff6507ec0f SHA-1: 2f1013ba9b55e59797cd9991f38f8566af937eef SHA-256: bf2f20e7d01c59a4fd97914355f6b5b10f0e67bde840a715eec1277751e5d21d
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites. These links likely serve as a distribution mechanism for further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a55cb5df3---mevifamugofatefalomagati.pdf In PDF document text
    • http://win-sonic.com/kida2018/ck_imgs/files/29489178177.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160795d1f5b6ec---80116804424.pdfIn PDF document text
    • https://galerie-louise.be/userfiles/files/62983785331.pdfIn PDF document text
    • https://icoachyou.biz/images/ckeditor/files/toviburifizi.pdfIn PDF document text
    • http://zonwering-nederland.nl/ckfinder/userfiles/files/68278145959.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cda67badf11---78539179926.pdfIn PDF document text
    • http://4bx.pl/public/file/9310666464.pdfIn PDF document text
    • http://goodslib.com/userfiles/files/falebugogi.pdfIn PDF document text
    • http://kleinschadenexpert.de/userfiles/file/lepamurojojowadelaxadege.pdfIn PDF document text
    • http://gazosilikatnn.ru/uploads/files/75093259473.pdfIn PDF document text
    • http://slanfusa.org/clients/47225/File/83505130962.pdfIn PDF document text
    • http://kingsfinancialconsulting.com/userfiles/file/judujotaf.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd6c41e897---piraxamufag.pdfIn PDF document text
    • https://hotellemaritime.com/hotel/upload/files/dewapulurarafir.pdfIn PDF document text
    • http://tuanayapim.com/rsm/files/lotazimufumojovezulew.pdfIn PDF document text
    • http://reginahajo.hu/_user/file/6476402408.pdfIn PDF document text
    • http://dilimkebab.com/userfiles/file/pevobopek.pdfIn PDF document text
    • http://studiovalentini.eu/userfiles/files/mupagidabenukujas.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611dfeaaab7ff---peroxanofusakesarozonere.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/59781974077.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/namobiwunutilijewerepow.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd4677861c---78499594186.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f05a8f2c97---vetamivar.pdfIn PDF document text
    • http://com123.vn/uploads/file/botiko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=5.4+puzzle+time+answer+key+did+you+hear+aboutPDF 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_off0000c3ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3CE 11432 bytes
SHA-256: 27b746f71a9e3a4c28ac6e31bbb82780e19617b22e6235e0c1c87409f52acfcc
font_01_sfnt_off0000de82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE82 17284 bytes
SHA-256: 4ab28a0e945e23dc5ea506432cdd8bce38565e34fe7f8a6596e45c62f467bcd0
font_02_sfnt_off00010b99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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