Malicious PDF — malware analysis report

Static analysis result for SHA-256 33eca9d8f9c59b5e…

MALICIOUS

PDF

69.5 KB Created: 2021-09-04 04:56:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2efa917d8f355e30d42db62938876767 SHA-1: 16b8eb1190fbcabcfb02bf2d67c351da2fa80814 SHA-256: 33eca9d8f9c59b5ec2bc804ca9d15cd39fabb661acc37f662c14dddbf836fca6
176 Risk Score

Malware Insights

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

The PDF is identified as a phishing lure due to its image-only nature and embedded clickable links. Multiple heuristics indicate it's a link farm hosted on compromised CMS uploads, suggesting an attempt to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c05f920ed0---28494238561.pdf In PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c5245290dc7---mepidafiguzeredesiwivador.pdfIn PDF document text
    • https://directorvincentchow.com/fck_filemanager_upload/file/digoziwunawibufixuv.pdfIn PDF document text
    • http://odontoflash.eu/userfiles/files/besafuvafemaxokadekoxi.pdfIn PDF document text
    • https://olboihorgaszto.hu/editor_up2/kivirazotejukunebiruwopo.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/jutiparametepomazenigune.pdfIn PDF document text
    • https://quangcaobienbang.vn/upload/fck/file/mawipajogetozav.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/aa6b63215b6029429a33c1166ed46726/96083830174.pdfIn PDF document text
    • http://kath-kiga-bw.de/bilder/berichte/file/2368254413.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ba3a4b1fbf9---meduzipawufupi.pdfIn PDF document text
    • http://brianhaymore.com/images/e/file/ponokapegomapat.pdfIn PDF document text
    • http://leton.pl/userfiles/file/71927745667.pdfIn PDF document text
    • http://delannahotel.com/user_img/file/pebadigudoragilogetafiva.pdfIn PDF document text
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/pf21j9k2pj4k8934i922gpsat6/32672112427.pdfIn PDF document text
    • https://agatanorek.com/files/file/99799243803.pdfIn PDF document text
    • http://inglewood1968.com/clients/68690/File/rijimeloruvi.pdfIn PDF document text
    • http://lorofilmes.com/Uploads/ckfinder/userfiles/files/mebakozexifikivisiko.pdfIn PDF document text
    • http://www.haztartasigepszakuzlet.hu/pics/file/refoluliniw.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c31d799d31b---wusivaza.pdfIn PDF document text
    • http://rudolphalexander.com/uploads/files/zozupetanaselujekalinidum.pdfIn PDF document text
    • https://kawanmto.com/contents//files/satenuradosiruwafavidov.pdfIn PDF document text
    • http://csc025.com/userfiles/file/20210612172318_ztkexk.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e65599c7c5d---mutewokonowan.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/43548207257.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/wipixumosidurizudiwa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=tablaturas+para+guitarra+faciles+pdfPDF 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_off0000b531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB531 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD43 13964 bytes
SHA-256: 8d29e89a8901dad039a3091cd1ac91241a9a944d20cadf8d152099e3ae5f5a49
font_02_sfnt_off0000ef8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8A 10772 bytes
SHA-256: 3060c384a9b3a891179649b77a0f333f68bc6eaed34dc4ea4e51a33e3b11c588

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