Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed9a4e85006ca0b3…

MALICIOUS

PDF

103.8 KB Created: 2021-06-30 20:01:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 66a77677591bf35ede9321eec6b99d83 SHA-1: 4ed22ff5365b3eaf5b002486eeb5a1b9807d4db6 SHA-256: ed9a4e85006ca0b37d10dc6b9365a46df6fb6b1462dac96ada4b3e9965900180
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to various domains, some of which appear to be compromised WordPress upload directories or disposable hosting. The primary purpose seems to be directing users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://sumtinathholidays.com/admin/uploadfiles/file/mugufapegedo.pdf In PDF document text
    • https://thefertilizerequipment.com/d/files/zikexedovutenugakalewojik.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf9208ba5a---viwazulup.pdfIn PDF document text
    • http://roocenter.ru/upload/file/vodalurufunugafopene.pdfIn PDF document text
    • https://bluza-shop.ru/content/File/ximanalisuxomigikifav.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160891111371b8---poronabagam.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/lisezefirenekev.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c68ffb378ab---vabejozelamakevamudosi.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089efa9a64cf---34782798357.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/o009bnbvijk9oq3quf5liqpfl4/33326021039.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160719d5c872c6---8707232263.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cee4396f5b0---49577092717.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/32007839185.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/3c5bf20d3ac7493a3c882805b068e69d/36459444021.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1ec693433---70372943332.pdfIn PDF document text
    • https://cape-electronics.com/media/file/29283447323.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b5f77fb3eb4---98600044890.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/06ec085dd4f21bee08df1bbc328015f1/tajuxanowados.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/f27d42ef5b1dfcbbf881b734b598039b/xurapewog.pdfIn PDF document text
    • http://studioguagnoni.it/userfiles/files/45006677974.pdfIn PDF document text
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/fd99lbnl0pcfbbg91uuovbl7kc/90897333936.pdfIn PDF document text
    • http://mabifitness.it/userfiles/files/76533582711.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e8530926d---buxizuputuruxoluw.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/5dadbdb8b71a22608783bc14593ca1d7/wobuxukuderimasebobaxozot.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c6607f6a127---37055326543.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=global+express+guaranteed+hoursPDF 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_off00012fed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FED 10960 bytes
SHA-256: de5da0d9e144b878f75b8fa3431c472cb97dd191e6de433fc180c98ebfd7bc53
font_01_sfnt_off000148ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148ED 18496 bytes
SHA-256: 3e9f7a93f9ce4ef9f4cfaccc4866671845a3484113b15bb7a0849179a07dbf93
font_02_sfnt_off000179e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x179E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1