Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ed96f23e7cc61af…

MALICIOUS

PDF

76.3 KB Created: 2021-09-03 05:34:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d89283fed714686b94e4362e847dc104 SHA-1: 54fe644a416da0214c8453ce6c506b4a61068ad5 SHA-256: 7ed96f23e7cc61af4c2a614dcc71ef567e40fef9db88d47516276eafc71ca4b7
96 Risk Score

Malware Insights

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

The ML classifier and PDF heuristics strongly indicate malicious intent. The document functions as a link farm, containing numerous URLs pointing to domains that are either disposable or associated with compromised CMS uploads. These links likely serve as lures for phishing attacks or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • 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://infrive.ru/uplcv?utm_term=ccnp+security+firewall+642-618+official+cert+guide+pdf PDF link annotation
    • https://agentcctv.com/userfiles/file/xajuxakutadix.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ca1a7efdc---wufeterufalu.pdfIn PDF document text
    • http://www.farmaciapenil.es/userfiles/files/98407227995.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d18a62fcae---pakawefafegezegodogizu.pdfIn PDF document text
    • http://okeefesreef.com/ckfinder/userfiles/files/82727433970.pdfIn PDF document text
    • http://galeriejacqueselbaz.com/userfiles/file/48617532461.pdfIn PDF document text
    • http://www.gesas.it/media/mailinglist/file/lesawe.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/376a7c919b2ae53cc97b2ed5ad6854cf/zogozewesa.pdfIn PDF document text
    • http://patrick-jardinage.fr/ckfinder/userfiles/files/27505781763.pdfIn PDF document text
    • https://przyklejki.pl/userfiles/41829153523.pdfIn PDF document text
    • http://texinpack.com/uploadfile/file///2021080701433412.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/ifdqrotpbe1cum7rde27dp463m/44297736944.pdfIn PDF document text
    • http://slp72.com/clients/7/7b/7b902bee17765b19ebdde6030f24742d/File/22303608287.pdfIn PDF document text
    • http://purepoem.com/resource/docContentImg/file/2021-08-02/72dcb6a622244000ca5f9de144189388.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/ok69o53bkhvmt6km8fs4ft34d2/babajosunogosajawolaf.pdfIn PDF document text
    • http://daiichibus.vn/uploads/news_file/latapusokajepexarivajexez.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/7afl3psea9o5303hfd164vbshb/63538240882.pdfIn PDF document text
    • http://chamdure.com/DATA/files/zerelijegafabegunavu.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af47368fcee---jenanoxa.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/945d245b80ecd54e37b96fb279c3e207/zaxomepimofizof.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b51bd174378---2854714941.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/51369650791.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ba78806b9f6---siwelulutokegezepot.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612b93677626a---22793331779.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_off0000bef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD703 17928 bytes
SHA-256: d376d90a3f9b515b7b044261c498c80094c04a8bae225c1a701334b99ed166a3
font_02_sfnt_off00010616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10616 11788 bytes
SHA-256: 52f14a622fc4abf0902671d15facda6e2807b7ce0a3ec988e30e25eac4122400

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