Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dede992f16b22a1…

MALICIOUS

PDF

90.2 KB Created: 2021-09-04 15:16:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 30e122171b66898a1db4600d77d9b3b7 SHA-1: 6808b3c536a1d1936c06752e24aa534966184522 SHA-256: 2dede992f16b22a1b08810e4de16c288430e8c1c49d044fe7427837235e62729
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of a link farm on disposable hosting and the use of UTM parameters suggest an attempt to obscure the true destination and potentially for SEO manipulation to lure victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • 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://krisoc.ru/uplcv?utm_term=x86+assembly+language+tutorial+pdf PDF link annotation
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e246c69d6---79295721449.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160af41b5879b4---92867256538.pdfIn PDF document text
    • https://fwstc.in/userfiles/file/vivakirakekisukawalab.pdfIn PDF document text
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/delulito.pdfIn PDF document text
    • http://vhz.cz/user-files/bedolojiraniseke.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/firogalabat.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/978d6d1716b05453107a0182f3265538/ziloginevimoxanajar.pdfIn PDF document text
    • http://fotosvatba.net/userfiles/file/10298086530.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d88ed41c5---pebosujeramozo.pdfIn PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/95ace72ma3oun6vf5npdsdsfss/42551853440.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080db42566d5---fasedojured.pdfIn PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/87638023294.pdfIn PDF document text
    • http://maiodi.com/userfiles/files/vepudujuberepugutowik.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16103068cc625f---25141838939.pdfIn PDF document text
    • http://xn--80age2amlc.xn--80adxhks/pics/images/file/39181030642.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b391bb02000---menofebotakaxujal.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/5363e279f6ef6d9d19e3675c55ffa427/pivatepevodipalusibujinoz.pdfIn PDF document text
    • http://coopmong.com/ckupload/files/vofoxamegelizekivip.pdfIn PDF document text
    • http://swadeministries.com/pastor-sammy/upload/imagecontent/file/62271816171.pdfIn PDF document text
    • https://samuelben-horin.com/userfiles/file/kexigafenodivuxawaxala.pdfIn PDF document text
    • http://jiendurancecoaching.com/ckfinder/userfiles/files/498012506.pdfIn PDF document text
    • http://zonwering-nederland.nl/ckfinder/userfiles/files/walikerawiki.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/boxigoluraxeteguro.pdfIn PDF document text
    • 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_off0000f4a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A9 11580 bytes
SHA-256: b7cc469d412881467d132a9880aa5e0851de53f71618e9ce20a0a532b38b2dc3
font_01_sfnt_off00010fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBF 19740 bytes
SHA-256: f98c0717bd32ae87be55c139281b95b950cc7558e49bb82acbf5b28e0ed41577
font_02_sfnt_off000142f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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