Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb2e4adb8475b8b0…

MALICIOUS

PDF

85.8 KB Created: 2021-09-01 04:49:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a3a59c7990f41854ae7ca14f7c35c3bf SHA-1: a31e19f4efe80e8a9508d6a638ecee92810712b1 SHA-256: bb2e4adb8475b8b0e5345f7f3a18faed23ac3fa4fbf7ba81a43e2c77cedd6bc6
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of links pointing to compromised WordPress upload directories, suggesting it is designed to host and distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077fd85e2909---lepilenewaxedevuviruf.pdf In PDF document text
    • http://okeefesreef.com/ckfinder/userfiles/files/nubonisunirakima.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d20995a73c5---82736477840.pdfIn PDF document text
    • http://seamacros.com/upload/file/jazokabetodom.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16110ec0c94702---rejutekamesujikazaro.pdfIn PDF document text
    • http://grgct.com/ckfinder/userfiles/files/xifonanubita.pdfIn PDF document text
    • http://veiligheidsslot.nl/ckfinder/userfiles/files/57926688118.pdfIn PDF document text
    • https://twinslock.com/ckfinder/userfiles/files/14028819191.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/16712771121.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bf4df9615f9---lorarekapumudubupop.pdfIn PDF document text
    • http://artistalexanderkanevskyroyalshakespeareglobetheatrelondon.com/clientMedia/file/5065666096.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a61c0a316be---2971583210.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/damaxanunuvotila.pdfIn PDF document text
    • http://designpavelzapletal.cz/files/file/66425186739.pdfIn PDF document text
    • http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/fodavile.pdfIn PDF document text
    • https://kipass.fr/userfiles/file/kosalipozuvavowunut.pdfIn PDF document text
    • https://oriental-kitchens.com/userfiles/files/84609758903.pdfIn PDF document text
    • http://mundori.com/js/ckfinder/userfiles/files/mosawoku.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073941eacea1---semegiferutal.pdfIn PDF document text
    • http://andersonlawdecorah.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jegikezivigenotite.pdfIn PDF document text
    • https://bishopsalamatkhokhar.org/userfiles/file/nixafifagituwexofad.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/sopojulupebevisabom.pdfIn PDF document text
    • http://ahs1978hounds.com/clients/0/09/09313dc2b2b2138818c22350edca9cf7/File/51138995689.pdfIn PDF document text
    • http://poiskvod.ru/images/file/55107943811.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=how+to+find+solubility+productPDF 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_off0000e4cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CD 19836 bytes
SHA-256: 39875611c2c0b0abb0c2d0bc6e104aa182771ee57c4d1e21d24378e261d7fee6
font_01_sfnt_off00011892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11892 10752 bytes
SHA-256: f0998bce91a2ff4aa3fc6f5e0a9a0054a4060026952679f74eb19b6b67a57b6b
font_02_sfnt_off00013132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13132 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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