Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e82c26d5be09619…

MALICIOUS

PDF

94.6 KB Created: 2021-07-13 10:30:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 764dfbf36cae5a6617165d78fdf57ddd SHA-1: d3a47b73b10cc862f6df3c0ca95d414f6fc4efcc SHA-256: 4e82c26d5be0961905311fa630ea56a718bfa8bb2485a00e4ce107eae2a03c5d
156 Risk Score

Malware Insights

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

The PDF contains a large number of external URIs, many of which point to compromised or disposable hosting domains, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://srlamn.com/clients/0/00/00e84243199fd86ca7c15d66a0237eb0/File/41002999569.pdf In PDF document text
    • http://wskinbody.com/data/boardData/files/mofonewoxilaka.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/8ce564eebca2ded7cc0b854280092e31/84698860671.pdfIn PDF document text
    • http://nebovsem.ru/app/webroot/files/files/89338346016.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/72264134772.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1310eb295---vurepijejas.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/b9eec6ad2ba78d4672821fc992c0ef63/97317834613.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607b57f32086d---69280683016.pdfIn PDF document text
    • http://xn--9w3b11kh5l.com/ckupload/files/zodaxowipo.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/29d7d13868ca9dfc58c4b080208f5938/jasuwinedawupu.pdfIn PDF document text
    • https://tsydesign.com/userfiles/jws/files/gupixowubotaka.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/me30isdps7mo6k6be51rabksq7/86386196106.pdfIn PDF document text
    • https://carcable-bg.com/uploads/pictures/files/62660154731.pdfIn PDF document text
    • http://thementalhealthadvocates.org/files/userfiles/file/11631381526.pdfIn PDF document text
    • http://casaperferiesantamariagoretti.com/writable/public/userfiles/file/81554071481.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/e6808ba76aa357323a86df9d5e3ba82b/69033908881.pdfIn PDF document text
    • https://nenanhduong.vn/Upload/files/mijokelogux.pdfIn PDF document text
    • http://gleneaglehoa.org/images/file/zebefenesedag.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160713fcae469d---nimefusezidixabipezikixin.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc0d9b04bb1---dabufegemabufebifevipi.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/2745e7ac00bb9c440be041b14e9536f7/zuvufugupinefububisupu.pdfIn PDF document text
    • https://arch.ua/ckfinder/userfiles/files/13748280135.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/64c62dd6127a1e36f8b62fb39b81566c/sagalule.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d17d5b7270---xofewerajawepikazejuwi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=monday+tuesday+wednesday+thursday+friday+saturday+sunday+country+songPDF 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_off00010d5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5E 17388 bytes
SHA-256: a9c7c69e6d5c02ac3540b4c050bd5da7bb5949fb21c7a7adab4e8967cf441987
font_01_sfnt_off00013ad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AD9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000152f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152F0 11000 bytes
SHA-256: 20b735df1f4705ab57439511f64bb76dfcf8e08a62dd5c2558f99132eca9aeb6