Malicious PDF — malware analysis report

Static analysis result for SHA-256 26a4748d1751b3c7…

MALICIOUS

PDF

85.2 KB Created: 2021-09-13 05:57:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f8099dc25a4a9eae3c3603121ddda86a SHA-1: 7ac123ba09c98202d38f5cf07ccea44bf3e08920 SHA-256: 26a4748d1751b3c725fc4b87acfcc861d949da1f9c015541c354ae8c74b23f5b
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and multiple URLs pointing to compromised websites, indicating a malicious intent to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest the document is part of a link farm designed to host malicious content or phishing pages. ClamAV also detected this file as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://catamma.ru/uplcv?utm_term=the+crown+pdf+kiera+cass PDF link annotation
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/51347355529.pdfIn PDF document text
    • http://alacarte-grafik.de/userfiles/file/xotexixozogibodubaxaluter.pdfIn PDF document text
    • https://fasleh.net/Files/files/65202522721.pdfIn PDF document text
    • http://nfc-lampang.com/user_img/files/21101741201.pdfIn PDF document text
    • http://electriccityusa.com/images/fck_uploads/file/445247423.pdfIn PDF document text
    • http://letresorellebio.it/userfiles/files/99921290891.pdfIn PDF document text
    • http://doks-films.com/pcms/content/file/80354853558.pdfIn PDF document text
    • http://qianlong99.org/ckfinder/userfiles/files/19288684037.pdfIn PDF document text
    • https://zoomkish.com/basefile/zoomkishcom/files/97714343701.pdfIn PDF document text
    • http://wwm-quanta.com/upload/files/lebosepifisanupug.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/5afe5698a26236d133ccb5521df34bd1/48891086289.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/ac19dec6edd9b802b2618f703ee76b3e/pimuwubapewinepeb.pdfIn PDF document text
    • http://friulanamarmi.it/images/file/jizakosozadukoxakelimol.pdfIn PDF document text
    • http://www.ishvani.com/www/js/ckfinder/userfiles/files/pozupuvapalolosasur.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///4105256280.pdfIn PDF document text
    • https://hk-delight.com/UploadFiles/file/17667067343.pdfIn PDF document text
    • http://bancasemecanino.com/userfiles/files/gexukedasirajufarofewavu.pdfIn PDF document text
    • http://neteyes.eu/editor_up/lijawodupijakabop.pdfIn PDF document text
    • http://cdio.vn/uploads/userfiles/file/12036048424.pdfIn PDF document text
    • http://proclima-membranes.ru/userfiles/file/sajarijojepi.pdfIn PDF document text
    • http://eclickapps.in/userfiles/files/33428018443.pdfIn PDF document text
    • http://uekekb.ru/!upload/files/rupixagemegasufux.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c8ae9c296d---92829377486.pdfIn PDF document text
    • http://fcraregistration.com/UploadedData/file/10061611660.pdfIn PDF document text
    • https://magiccat.pro/ckfinder/userfiles/files/30192626025.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE864 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10076 17904 bytes
SHA-256: 7e5f9ee7702433366fa3d9a8bad6c80f5437f409a2737bbd2eb496cb32c80dba
font_02_sfnt_off00012eb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EB2 10712 bytes
SHA-256: 986dd356c275e5599c4242601e4614cb62c40ab0873cc2c3d884721d5f4054ac

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