Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a3a2a34dcbbcd1b…

MALICIOUS

PDF

79.3 KB Created: 2021-09-12 21:03:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3998c6dc1e23b5eba53f6c96a436406d SHA-1: fcd40d13d19b418dc0d4f9e4eb16b60851a657ac SHA-256: 2a3a2a34dcbbcd1b387ef812ee45ad857a48670664dbd97e089e75b92268f08d
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and a large number of external URIs, many of which point to compromised or disposable hosting. These links form a link farm, likely intended to redirect users to download malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • 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://petek.biz/resimler/files/nanosobovefudeto.pdf In PDF document text
    • http://yas-center.ru/userfiles/file/wojesusolutevenanages.pdfIn PDF document text
    • https://psiakocky-potisk.cz/webpagebuilder/ckfinder/userfiles/files/84234431191.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16135303a466ba---zevofavorojebiferaxujab.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16134618dc0c91---sawakazemota.pdfIn PDF document text
    • http://kwiatmetal.pl/userfiles/file/20611913532.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/2ceb78e326351cdaa1ca25ed8c4dd91b/kiniwetekuxupuzi.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe9e64e50a---kigojowezixifukeluzekovev.pdfIn PDF document text
    • http://americandeliorder.com/uploads/files/siziluvegupazejoxifinub.pdfIn PDF document text
    • http://kzlo.pl/fotki/fotki/file/gukirixutowosebatexi.pdfIn PDF document text
    • http://mitchelllawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/74893740791.pdfIn PDF document text
    • https://aiwcecckolkata.org/FCKeditor/file/vojakosekenufixonu.pdfIn PDF document text
    • http://bitree.net/ckfinder/userfiles/files/31685729762.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/pufis.pdfIn PDF document text
    • https://ganport.pl/userfiles/file/dipitusokepapaf.pdfIn PDF document text
    • https://sitpchemcieszyn.pl/_sitpchem/file/89565190131.pdfIn PDF document text
    • http://maszyny.pl/userfiles/file/romesevogejokovuxetig.pdfIn PDF document text
    • http://shanghaicruiseparty.com/uploads/file/20284415387.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/files/22585883973.pdfIn PDF document text
    • http://hainfelderteich.at/45084850846.pdfIn PDF document text
    • http://theclelandgroup.com/img/upload/file/92115155470.pdfIn PDF document text
    • https://xn--bankkrtya-41a.hu/js/ckfinder/userfiles/files/zewukumosapaj.pdfIn PDF document text
    • http://www.azurwelcomeservices.com/userfiles/file/padivofomatimininabape.pdfIn PDF document text
    • http://ssaisarang.com/ckfinder/userfiles/files/webanurejolod.pdfIn PDF document text
    • http://abc-tel.ru/data/File/vevawitotovevakuwiwedu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=ireal+book+android+downloadPDF 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_off0000d0e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E4 10244 bytes
SHA-256: 1c0f95ad64eaf77477ee0afe036125a68d8cf50ea837fe0cedfda1c17cb01e9a
font_01_sfnt_off0000e7fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001000c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000C 18548 bytes
SHA-256: 2cf933d0f637aadde0f4887b250c1c2323de4a07e6aaff6b75c5bfd85f04fe90

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