Malicious PDF — malware analysis report

Static analysis result for SHA-256 36109abb5551870c…

MALICIOUS

PDF

89.7 KB Created: 2021-07-06 06:03:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 480e02824f1102717bda60ba46dcd805 SHA-1: f7c0919dc6fecb34c4bc9ad20d6378e3f2e9dc70 SHA-256: 36109abb5551870cb1a92d880fd5c7f83a0980989d08b954ac3fd7ec5f5ccd5c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised WordPress sites that host further PDF files. These linked files are likely part of a phishing or malware distribution chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160de766ae9093---55115638300.pdf In PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/2f6808c446473b5b5eda883e0ba1e934/rerakafitizosatidaweg.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/ec2a9b0377d8561519375e51bb83ddd1/kotovozosokuveg.pdfIn PDF document text
    • http://live-lessons.net/lcj/web/uploads/assets/file/78160140873.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/tokuvawokumobutimawix.pdfIn PDF document text
    • https://ngoctraithaibinhduong.com/uploads/news_file/mumoli.pdfIn PDF document text
    • http://fautographie.org/images/userfiles/files/14364602763.pdfIn PDF document text
    • http://motivationandmomentum.net/ci/userfiles/files/damorejowubisurawole.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/f1113f4c7aedf70e912975ea500339e6/18909976957.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/b5de2d7c31206d4edac21ce7ac97606c/69062712961.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/8c10ec28e19185692430979056326f92/xapobimikonediwopafaridi.pdfIn PDF document text
    • https://dammesliepas.lv/ckfinder/userfiles/files/31105938492.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/7aobliab38ic86mej6mrerfvu5/2008210258.pdfIn PDF document text
    • http://rutherford58.com/clients/5/5b/5b2824e44de76337c32dfcbc3ee6dba3/File/87288087807.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7680701de---zinidiripedoranubaxipaji.pdfIn PDF document text
    • https://sinhadventure.com/uploads/file/47402281968.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/7de4bfd625dffc5f6977d800f4871739/vuliwe.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/76050971726.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c8cc6476116---pefolupefizuwumokad.pdfIn PDF document text
    • https://istanajp2.com/contents//files/48372617170.pdfIn PDF document text
    • http://flynewsletter.com/uploads/file/zuginomot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=what+does+iv+stand+for+in+sciencePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e64e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64E 17212 bytes
SHA-256: 96d678da9dd4d9994ed291b97f276e997e8d9e71afb2bf7bf97e3a9c2d77f641
font_01_sfnt_off00011300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11300 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B17 10588 bytes
SHA-256: 6f9363ee58abfe09bcc350594dee94a95a97a7d4d50f7689d5f5dd295abd7522
font_03_sfnt_off00014346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14346 16252 bytes
SHA-256: bfc7ce51a1a9b37382af61f0075eb0cdb972126da031002d338643432d80e6e4

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