Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eeb7ebde07e7c49…

MALICIOUS

PDF

80.5 KB Created: 2021-09-22 11:51:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 52a12f24fa3d7d45dd48753904d681bf SHA-1: 32bb54109a8d92e9f72713d8c71309978648781d SHA-256: 2eeb7ebde07e7c49c38c3a506eb4b4b2bd9dfa4875a7a76abe8e2705d4c3228e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, directing users to multiple compromised or disposable hosting sites. The presence of numerous URLs, many pointing to potentially malicious content, supports the classification as a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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
  • 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://aotwresort.org/ckfinder/userfiles/files/nijopemuzabetamitifo.pdf In PDF document text
    • http://muntepa.com/userfiles/files/xifomijozeruj.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/8785bc4c1b60a2623fe234c014168292/bixeranujenisobukaxaw.pdfIn PDF document text
    • http://clinicaveterinariacene.com/userfiles/files/vepewubodom.pdfIn PDF document text
    • https://tyko.pl/userfiles/file/najigiweparifiva.pdfIn PDF document text
    • https://stgeorgedentalcare.in/ckfinder/userfiles/files/wogaxozizov.pdfIn PDF document text
    • http://splogservice.ru/content/file/1944706030.pdfIn PDF document text
    • https://asztromiskolc.hu/ckfinder/userfiles/files/14813349192.pdfIn PDF document text
    • https://njshore.drinkpoint.com/uploads/files/12821133579.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/11593703172.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613860823debd---kifovifukoge.pdfIn PDF document text
    • http://njxinbell.com/upload/files/tevewotiduvekeru.pdfIn PDF document text
    • http://zonweringbelgie.com/ckfinder/userfiles/files/13013977903.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131701190faf---97170805924.pdfIn PDF document text
    • https://drhuanghair.com/uploads/files/202109111245126005.pdfIn PDF document text
    • http://vpsystem.com/files/fck/78249468842.pdfIn PDF document text
    • https://nuttydog.hu/ckfinder/userfiles/files/81601127817.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/638f9d2cc8820365c0a37ac20d074fa7/44720652395.pdfIn PDF document text
    • https://braintreeclinics.com/app/webroot/img/files/27228633500.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/f5c94fa8ef8ee8556246f5fbe81d3b95/kowanu.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/53cfl4dve3du676vtahbtfphb7/71872129450.pdfIn PDF document text
    • http://novena99.com/uploads/files/202109220244098473.pdfIn PDF document text
    • http://jyotiacademicpress.org/uploads/file/80680467275.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=medical+biochemistry+books+pdfPDF 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_off0000d37c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD37C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8E 17912 bytes
SHA-256: 23236b9274ae7909f764c7e5b9e770d742cbe1584052fb1fd31984159542bc65
font_02_sfnt_off00011a71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A71 11120 bytes
SHA-256: 6517a507cd760aab31220f6b94c3ffb8bf0c40fdf7e0308d7239e902ea247097

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