Malicious PDF — malware analysis report

Static analysis result for SHA-256 47c56c9844f2ed14…

MALICIOUS

PDF

87.7 KB Created: 2021-09-03 12:59:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 699243acfce00202851706fb21efaeb3 SHA-1: 9fc37565035a28643ca9278d433711b105cf4141 SHA-256: 47c56c9844f2ed14703056a04893c91c32c4dcfca983875e4cbde3a93562ec08
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it's designed to lead users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7176

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://medvor.ru/uplcv?utm_term=nutrition+guidelines+ethiopia+pdf PDF link annotation
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/4782c8a50edc2ca1580a03ad81e86471/93511620505.pdfIn PDF document text
    • https://activepymes.com/pub/file/32058440868.pdfIn PDF document text
    • http://d4smontreal.com/clients/f/f5/f58105ca183540932673f5bf18e62671/File/pijopipejuranodizisezoke.pdfIn PDF document text
    • http://xsteelstock.com/d/files/powiza.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/12337d8037c2e4775fed94090b70b1f8/53462522627.pdfIn PDF document text
    • https://agenciaboom.com/wp-content/plugins/super-forms/uploads/php/files/g5lkclvltvmt75c7ck7bm9e154/50084550685.pdfIn PDF document text
    • https://lederstuhlshop.de/ckfinder/userfiles/files/pikenil.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/a435d277262cec72c7c1d5e4ab3f8b7a/kedivowusoze.pdfIn PDF document text
    • https://bettyloupaints.com/userfiles/files/bafujupalofavowajam.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/radaje.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/07289e7936e58156517a0020135ff40b/wejore.pdfIn PDF document text
    • https://4of100churchstreet.com/assets/media/files/kumojudexuj.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160bb0d8ab6133---lukazijujune.pdfIn PDF document text
    • https://www.abrasco.org.br/ckfinder/userfiles/files/51916167276.pdfIn PDF document text
    • https://samudra99.com/contents//files/vimemetojot.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608d34b24e7c0---40238824592.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/2vkjk1rn1mtiodhk2aqt565iq6/59115156288.pdfIn PDF document text
    • http://anandamsanyal.com/userfiles/file/vurujagelofi.pdfIn PDF document text
    • http://mathcountsoutreach.org/userfiles/file/41289294652.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/8adb838320fac2620396dedffa007bfc/runozabijamotepakotif.pdfIn PDF document text
    • http://unnatiwelfareorganization.com/ckfinder/userfiles/files/sepinekukotanebidojini.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/e4c8a317ae2d7950d9caa5aa3122f99f/28508199317.pdfIn PDF document text
    • http://ks4073.com/file_media/file_image/file/wijiverenarija.pdfIn PDF document text
    • http://reversetheclocknow.com/ckfinder/userfiles/files/makuko.pdfIn PDF document text
    • http://dhf-china.com/d/files/xizoputemaj.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/delinoriferagupuma.pdfIn 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_off0000fd70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD70 10856 bytes
SHA-256: 820bce70bbb9a148cfcc7219e7aeece42afd897fe9dfbd41ed9635b98dcd8e0e
font_01_sfnt_off00011636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11636 19432 bytes
SHA-256: 88b0dadc2c6630d3316056841e190da39c5660dc6a9db07745ebb1a402759216
font_02_sfnt_off00014793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14793 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1