Malicious PDF — malware analysis report

Static analysis result for SHA-256 d301c20e7cc0edd6…

MALICIOUS

PDF

86.2 KB Created: 2021-06-26 03:17:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ddbbd003df2740bd153b823f09cbf7a8 SHA-1: 9fd737cc542ee0a3896221cb70fcf1c376899f91 SHA-256: d301c20e7cc0edd6674894d5be167e9481b17753ade6c973a7257439397ffcc5
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as Pdf.Phishing.Trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or are structured as link farms. The presence of these links suggests an attempt to redirect users to malicious or phishing content, aligning with a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/a7fb74c1a3e092d0e0a42eb5d099cfb2/4834234663.pdf
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/b8775f8457a136b94c7d2e3755fb224c/laveruvenifilibe.pdf
    • https://acryl-bg.com/userfiles/file/90393097572.pdf
    • http://stressmanagement-karriere.de/userfiles/file/vexup.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/e969cba7208500a1b55e68893adbb6fc/guvasabadix.pdf
    • http://usmleworkout.com/files/file/60215658077.pdf
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091355087834---29151905297.pdf
    • http://samuiluxurytravel.com/Uploads/file/67821125530.pdf
    • http://archiprojektai.lt/app/webroot/uploads/userfiles/files/jenazaxudanumekekevagesa.pdf
    • https://catbasailing.com/upload/fck/file/44504983967.pdf
    • http://lamachine.nl/userfiles/file/kejuremusosaba.pdf
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/5c5fe04b13f753bd58fda072f33391e9/karipegotonisumorixeda.pdf
    • http://jagodkaprzedszkole.pl/userfiles/file/xuxetad.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608211ea403e7---kujalupega.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/8fnikh9rhj54q5vqrqvoqq35mm/65375631457.pdf
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b4f559563---tavawidajataxatifufekolaj.pdf
    • https://manuscripthandler.com/userfiles/file/33657490245.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c96291e919f---kujexebokojuvov.pdf
    • http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/mumurenopa.pdf
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16083568fd26d9---babinoli.pdf
    • http://vanillasky-ch.com/images/files/82077604250.pdf
    • http://pechati-piter.ru/userfiles/file/tokuvosijapofisoredijow.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed766943f3---bemije.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=cold+sweats+and+chills+without+fever
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edd0.bin
490fd8f3f87cd1f2bc2aded4d57b13eeaa38989290506be18ac42bc752fa825d
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD0 17084 bytes
font_01_sfnt_off00011a3d.bin
bad970d2eec67698604e860b34e053e0d8ef8c0bc0510d53d4ecec51462de3cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A3D 10856 bytes
font_02_sfnt_off0001335d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1335D 16792 bytes