Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a9761a73081895d…

MALICIOUS

PDF

83.6 KB Created: 2021-07-05 03:47:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c25516908c6623dc3edb74cc4cca2f45 SHA-1: 0791e24c59e4ed0b9d07dc597768d3e1bbdd0c2e SHA-256: 2a9761a73081895d6a6d7b1e1a974d98c6cb2d70daacadb3f001a6dffa8c769b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farms pointing to compromised websites and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://pixomot.ru/uplcv?utm_term=all+about+hymen PDF link annotation
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/44f7e7e13737033501d6ff175d057348/lexigen.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/eocaev9om4lch1ucn7vkhjl9ml/wikozodenekuferuzub.pdfIn PDF document text
    • https://sklep-pinokio.pl/web/uploads/files/58124284789.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/fcd9e41444aaf3849e4c4d439b6954b4/pozipakiguwizizewere.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/7d5953bbb9c550f3a3574584d2275097/sajetizamexofowazozu.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9b0374f81---gamivodurumukaripukopedar.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160df2aaf6447e---mexumugo.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/50649184361.pdfIn PDF document text
    • https://werbemittelag.chupload/file/68854379263.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a568ca03dd4---libejutimutewiradu.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6577bc4929---72430664787.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2e511a2a5---217222610.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/5905842067.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/ka9ur6qapatbc3oqpn8tcps60l/23659773733.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942f0f8dc33---zupafo.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/rlrh0jqtae9q77ji9p4f7ccbgg/wuvemujulonejari.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160808f3a622eb---gixakekujadabevubejogukof.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/soralezukesovisegogezolo.pdfIn PDF document text
    • https://dovolena-jiznicechy.cz/uploads/32353146194.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160843f272b4ea---pijajelex.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/4420bea85a1e6ebbffc670cdeedcbf93/fikemifegesasudid.pdfIn PDF document text
    • http://catherine-massage.com/ckfinder/userfiles/files/32400187614.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/f74aa439b2b99835adeda1c272e8d003/47634882337.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d33640c9227---57420335219.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/309bbf4168ff3f86160c0e36535e251f/86073088120.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/n64fnnogg6kgfme5406jetmp92/lokisixotilebad.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_off0000e7b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B2 16340 bytes
SHA-256: 21e2b610e735ff6f3aa64a8ba56187bb0d671a0031a15848d3a15672cfda94b7
font_01_sfnt_off00011215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11215 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A2C 10348 bytes
SHA-256: 3981c16f04c1b5d9ae6e362b7ee5378e9be404c1541bba48268c798b6b1830db