Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae6187eb24dbd2a3…

MALICIOUS

PDF

72.6 KB Created: 2021-09-04 06:22:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7340966bce18efb9ac5700ed45fe438e SHA-1: 4ebbd327e755178922c63f0ad7b8a5d225bde87b SHA-256: ae6187eb24dbd2a3398b9d39193a0b4977302dd16f9b9ea44fe816c0ae7a0b21
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d98a881859---ravigonodugixawafiv.pdf In PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16087d8502600f---5889052496.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160772e341d7a1---75215459282.pdfIn PDF document text
    • http://cnmrobotics.com/files/files/zegilokulogujexabolafilim.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c9407522b9a---71829015386.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/98605809534.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/d3c41ed33ab5dae8bccbc3b79e0a7e8c/bevozefatofagugovasugebok.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/161059447c9313---jojukafajumikisojogosul.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a42a7d7883a---91744208494.pdfIn PDF document text
    • http://aitrans.cn/UploadFile/file/F1202106132209236507.pdfIn PDF document text
    • https://promptcorporate.com/ckeditor/ckfinder/userfiles/files/xalemotirekoguz.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/nahk5pa6ri67ehdtf25uc0rt7a/62517799776.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/xezexa.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/ceqmd6q8l9onu3pmqop0rm8bc8/tilegowovuposotab.pdfIn PDF document text
    • http://frutapacargentina.com/ckfinder/userfiles/files/vegelubepipiroralexatu.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/716d775a533c8d3a4f5e23d5e13990b3/monib.pdfIn PDF document text
    • https://hardlineconstruct.ro/app/webroot/files/userfiles/files/91394346848.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/22dc8013836253a83e3206924888a622/mivofokofilugu.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b42307b064c---moloteragamisodoxew.pdfIn PDF document text
    • http://verdantnorwich.com/clients/3/30/306756bb587dffcd11ca74610d845a16/File/wilatujorito.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/gugemolinufozufivezizoge.pdfIn PDF document text
    • http://olynskiconstruction.com/pics/file/gozufudafagosepokofudatu.pdfIn PDF document text
    • http://gcoekmr.org/cukashmir/User_Files/imagefile/lubamozotejib.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6174b9f052---11210385776.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=basler+ace+gige+manualPDF 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_off0000b43a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB43A 10508 bytes
SHA-256: 2858416c607d3cb66cd11ab33b03756810d542a966e2d03cb6093b57a5f96d29
font_01_sfnt_off0000cc1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e42f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE42F 19104 bytes
SHA-256: d32387d03290195e901c861ce331b77c49439a51aa2ac0af19cba39e3433e024