Malicious PDF — malware analysis report

Static analysis result for SHA-256 f57f3f4bf9b24e57…

MALICIOUS

PDF

95.9 KB Created: 2021-06-30 08:00:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: a1a24359d9adf09219c16c11016599db SHA-1: 6f55f991b94152d4124768358578acf4576c1983 SHA-256: f57f3f4bf9b24e570ba400e5e2d30a2632b43f0fab9cdaa9cece948e13a3c330
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a phishing or malware distribution campaign. The PDF structure and embedded links are indicative of a spearphishing attachment, likely intended to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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 https://huntic.ru/uplcv?utm_term=soundtrack+dreamers+side+to+side PDF link annotation
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a386a31cc---39643238104.pdfIn PDF document text
    • http://gabortech.comadmin/file/67862701548.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/ae5d2faa769d490f2eed7a6d5e832bf3/jamelaxikitedizoxusugi.pdfIn PDF document text
    • https://kogan-photo.ru/wp-content/plugins/super-forms/uploads/php/files/2926026cac7c11a9f3b3efae5f1062d9/dakivisetaketofolodere.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f87561626---puluzejaxowefefuli.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160825b8162a58---tufimopofuzifaz.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/65361eb670f29e11a4bd5e7509d4b039/joterafo.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b76c79c1f---tavukamuvapofes.pdfIn PDF document text
    • https://juhaszautovill.hu/userfiles/file/3510595629.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/702fad9c86e3d2a61fc1a5dcf4378482/dununazovanufunoxo.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/1578fcac90420ec8ad61cfd509f560c5/41269835169.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/b07jpfojqhuaiedf8e460lud37/duruvigima.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/7mtom284j25sq4vhe4dcmuqaaf/20707890491.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16083b25ac2d66---faloruxigigesekomo.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16089ca6ab14ee---bikefepeku.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/3dbd5f8dfed94f348e67199a8c2f7f9a/36704219003.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608f3cf491381---49914098671.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a4fe4d262f7---62529450338.pdfIn PDF document text
    • https://bibliotheque-des-arts.ch/ckfinder/userfiles/files/90480736229.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/2fdb14fdce49c8dc7e192cb570ea59d5/pudodipo.pdfIn PDF document text
    • https://davaocarrental.com/images/file/82982376573.pdfIn PDF document text
    • http://musikpark-live.de/userfiles/file/74925786280.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/fidarukes.pdfIn PDF document text
    • http://thanuyentea.com/ckfinder/userfiles/files/10349635387.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000111d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D1 10752 bytes
SHA-256: a0c7e83aea96f561f9a518d6c410933ce98e17df9ed77a1600779654002d6b16
font_01_sfnt_off00012a90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000142a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142A2 17452 bytes
SHA-256: a302395ad0c504d4a9206f26cb607cf54e109e3c7a2f17e0585c714fc147a712

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