Malicious PDF — malware analysis report

Static analysis result for SHA-256 af30463bc2c05623…

MALICIOUS

PDF

74.5 KB Created: 2021-09-18 02:49:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: bbcac8384e507aabe239f4675508f3d6 SHA-1: 315242545d02dc7ae9e50607e1fbeaaa8d518c73 SHA-256: af30463bc2c05623b3aae5e550004ce92efb3f3ebce39793ac6e3fbe10779506
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress upload directories or disposable hosting domains, indicating a link farm designed to distribute malicious content or phish users. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. No scripts were extracted, but the structure and URL patterns strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://terminsk.by/pics/files/kolinatudofitezuvuxopek.pdf In PDF document text
    • https://samsunyapi.com/userfiles/files/mugusozusezudodibalos.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161347e659a74c---jonufaxugusetelafomevexak.pdfIn PDF document text
    • http://bobmeetin.com/media/galleries/files/sufowoza.pdfIn PDF document text
    • http://alituncer.net/userfiles/file/27190982498.pdfIn PDF document text
    • https://portugaliaimagyarok.com/ckfinder/userfiles/files/20305261379.pdfIn PDF document text
    • https://flomogroup.com/upload/files/52092133966.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16140fa175781c---50846681289.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/77251186679.pdfIn PDF document text
    • http://restravel.ru/ckfinder/userfiles/files/79342804365.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614504b0b4832---85383667248.pdfIn PDF document text
    • http://baharev76.ru/userfiles/file/sizoveleja.pdfIn PDF document text
    • https://samsungklima.net/upload/ckfinder/files/55574781621.pdfIn PDF document text
    • http://abpjse.news-read.com/upload/files/49129354791.pdfIn PDF document text
    • http://ubestsports.com/imager/files/20210910190856.pdfIn PDF document text
    • http://www.greddy.com/admin/common/ckfinder/userfiles/File/fuboliwetobiso.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130b4e50b0d4---lonozatanomovemuguki.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16133b4332855e---36980635954.pdfIn PDF document text
    • http://talleresjpg.es/img/file/zinewez.pdfIn PDF document text
    • https://coevent.ru/upload/files/fisavumokefagebumerubug.pdfIn PDF document text
    • http://nwatchonline.net/userfiles/file/lijuvul.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f83550ebf5---keluwopug.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/c48ca1440aa67ecd089426405ad1da8a/nalafazejelabo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=words+that+start+with+onPDF 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_off0000c388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC388 16456 bytes
SHA-256: d5f2c52653171964adcb073e3eee14a2d50a76972105c8ce32e565268f599523
font_01_sfnt_off0000ed90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000105a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A7 10244 bytes
SHA-256: 51e34e83d9484ff39b830151f72f583e12e265a830df62c9db3c5c934107fb25

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