Malicious PDF — malware analysis report

Static analysis result for SHA-256 93389a7886b60030…

MALICIOUS

PDF

85.1 KB Created: 2021-08-18 02:52:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: efb9741961fb74298ef374081308d137 SHA-1: 62819574f546a5b5b3829c742e14501d6d2ab11f SHA-256: 93389a7886b60030eaa32dc36339284c47729d65a19b4de32a6f4271c3f939eb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to various websites, including those hosted on compromised CMS platforms. The primary purpose appears to be directing users to potentially malicious content or phishing sites, leveraging a technique often associated with spearphishing attachments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 http://granite1962.com/clients/869125/File/xukemidizisanaralovi.pdf In PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/rs3e5pd9g2tsfufv5ib2mk5kob/wenawadafisiru.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16084284b4a98d---66764677675.pdfIn PDF document text
    • https://successalpha.team/upload/files/14538334946.pdfIn PDF document text
    • https://yucekalipmakina.com/tsrm1/img/userfiles/file/sarexowilip.pdfIn PDF document text
    • http://plnjl.com/userfiles/files/fuzubitewajeg.pdfIn PDF document text
    • https://prestinieurope.com/userfiles/files/59911299755.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/dab484c312727fe377e7322b45e12eae/99577577689.pdfIn PDF document text
    • http://mistral-paints.cz/userfiles/files/jevoxarapoliwux.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/11858030513.pdfIn PDF document text
    • https://artbynela.com/uploads/file/bakemirusezuvobekukigaw.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/7bc221565ac68de7e0d91434f968ea40/32189813847.pdfIn PDF document text
    • https://esprimagroup.com/userfiles/file/vakosonolilosiponep.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f17b5572388---38364783861.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/kexit.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/v7urku6rjea1jpvudia7rnmnrl/21179255554.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/ta2uebt0ft5rgnbvt5ai85166h/perimepapuzewu.pdfIn PDF document text
    • http://kssi.ir/public/userfiles/file/zojuvuwoju.pdfIn PDF document text
    • https://nepalaviationmuseum.com/userfiles/files/88901223579.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/4qarjhsp83sl4krpgfk8uk2vf2/7746943365.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/49858afffbf521e6853ca3fb01aeb8fd/42380481095.pdfIn PDF document text
    • https://biocoils.com/img/file/mikerumaduparivibewemulul.pdfIn PDF document text
    • http://www.greddy.com/admin/common/ckfinder/userfiles/File/buruzatajeren.pdfIn PDF document text
    • http://www.udelimpa.es/ckfinder/userfiles/files/jeweriruseziguz.pdfIn PDF document text
    • http://gr-chem.com/upload/files/79182885500.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=twilight+breaking+dawn+part+2+in+hindi+free+download+480p+khatrimazaPDF 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_off0000e224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE224 11644 bytes
SHA-256: 233892fd276ed696cd0be3ce9b4c0a929d47b06b82f3070f815ed8432027c5df
font_01_sfnt_off0000fd5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11571 17260 bytes
SHA-256: 5eca40a24ebc0221d8d924eaeaa524525792b5cbccdf8152c7aac888dde584f9