Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a18c3564c4b90d7…

MALICIOUS

PDF

81.8 KB Created: 2021-09-20 18:12:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: babe086d847cff0fef23487de0e4edc5 SHA-1: 5e2e88988ee53cd9ffea3b718e5aae29c7c029c9 SHA-256: 7a18c3564c4b90d7224d6f9ba86d034d40a244cc1243fbf6a362e6bf2bb0abfd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and numerous external links, many of which point to compromised websites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver further malware or phishing content. The embedded JavaScript is a common method for initiating malicious actions within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://hotelpancharatna.com/assets/userfiles/files/xewol.pdf In PDF document text
    • http://sitoad.com/bbqjoekey/files/202109031032313313.pdfIn PDF document text
    • https://associazionemusicaviva.it/uploads/file/mijiguzenotoponokalum.pdfIn PDF document text
    • http://pension-erlkoenig.de/img/editor/file/11452739673.pdfIn PDF document text
    • http://salman-is.com/userfiles/file/lobejuzugebalofavotupebe.pdfIn PDF document text
    • https://cfi-registration.amyhalter.com/buzzboxgift/img/userfiles/files/3424522601.pdfIn PDF document text
    • http://fiumaradelsossio.it/userfiles/files/lukaf.pdfIn PDF document text
    • https://keiba-like.biz/js/ckfinder/userfiles/files/runaxomija.pdfIn PDF document text
    • http://bielle-srl.com/userfiles/files/nifoliboxubojavudomexij.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/87557974635.pdfIn PDF document text
    • https://pacientes.quiroser.com/UserFilesQUI/file/kubagofesisukejujoxof.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/52fac6124fd258b03a06847ad080e05a/jafupagazavodaxelerel.pdfIn PDF document text
    • http://lasantitosrestaurant.com/userfiles/file/34071640892.pdfIn PDF document text
    • http://cinebuzz.be/uploads/userfiles/files/jijulen.pdfIn PDF document text
    • http://meyergarden.com/ckfinder/userfiles/files/worekizapufufejozimis.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130bd46457e9---regon.pdfIn PDF document text
    • http://mondoacquapiscine.com/userfiles/files/23975073445.pdfIn PDF document text
    • https://reazfarah.com/ckfinder/userfiles/files/59949569496.pdfIn PDF document text
    • https://siemreaptraveltours.com/userfiles/file/bapamowiba.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1612f741ce31f6---90978193595.pdfIn PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/pexoguxofiwavu.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/pob3oosfo04ouprnmsnc3rilp7/lifozuwoduvoluzojajowozeb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=starfinder+pdf+download+freePDF 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_off0000d9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A8 18340 bytes
SHA-256: 7d507b94240907e88b8a7165f87e4d93c653e9f735e7047f3332c6544f101b5e
font_01_sfnt_off0001096e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1096E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12185 10484 bytes
SHA-256: 905cf7fa6c9e5bd2418116e3757cbedcd70bdb1172977bcac49850d25e023eb4

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