Malicious PDF — malware analysis report

Static analysis result for SHA-256 054d309dab866074…

MALICIOUS

PDF

83.0 KB Created: 2021-06-27 08:30:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7fe426dbccb98a4e662c34cbf655ee01 SHA-1: 5570691b943e4914bc73798f68b3e9f4dc2bb5ae SHA-256: 054d309dab866074f0c64e59cf98f332423eb3ed17186cc79888f5b03fdd2883
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and links to compromised CMS upload storage, indicating it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further payloads. No scripts were extracted, but the structure and URL patterns are consistent with a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://inwebjor.ru/uplcv?utm_term=lord+i+confess+my+love+for+you+by+chinyere+udoma+lyrics
    • http://anapharmata.hu/ckfinder/core/connector/php/files/99168399981.pdf
    • http://rkmaster.ru/uploads/files/69763892674.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b29f884c4f---megitizijulumizedad.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079dbe73f4e9---masakumodetidumukadidufu.pdf
    • https://itacademyindia.com/ckfinder/userfiles/files/saboke.pdf
    • http://sieuthivatlieuhoanthien.com/upload/files/3680190176.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/48ebeb3f8acc3ef1556f80d24bf266be/feruxiwi.pdf
    • https://airshow-bg.com/file/sufowuzakefaw.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607181fecdff0---71654273209.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/d50ae90c46139b48d2f80364b938a64f/9233204552.pdf
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/160916288a2cdf---fawoxazipifizevowekites.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160863bc54cfb9---6798884971.pdf
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/4249d2fdeb47b07c6bd1047ef9ab817e/paridiwovadibewolisamif.pdf
    • https://langumeistras.lt/i/File/75415419955.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/8dda233d75ecb49676cab3304e49d53b/vovepojigivokomafod.pdf
    • http://aiswaryamatrimonials.com/fck_uploads/file/saxitunemifolakuje.pdf
    • https://pk-kuepfer.ch/ckfinder/userfiles/files/47540170968.pdf
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/29eb63b757020176d97a1677ec4a8d56/90052992771.pdf
    • http://thunderstar.cn/userfiles/file/20210618171827121185977.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160785b95ee19a---36117832734.pdf
    • http://novussiteyonetimi.com/uploads/file/54466979623.pdf
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/e243265d5a501d9d9650d4426d3083b7/25988170938.pdf
    • http://simmsfamilyreunion.com/clients/9/98/98d47f1658d09d39d77ba56043454c9c/File/rezamuxelodobezidavo.pdf
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160990fbc70703---73531677801.pdf
    • http://ed-web.cz/userfilesfile/43942239889.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000deac.bin
f351bcc729207a086451bf3449542911173b93c9a4e1aee0d97724b5696b8d5f
pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAC 17524 bytes
font_01_sfnt_off00010c99.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C99 16792 bytes
font_02_sfnt_off000124b0.bin
ea88a092bb27fbbe0dd9bedaa2105bad53f4d8ae817c2c11277fd53b59dd8e3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x124B0 11020 bytes