Malicious PDF — malware analysis report

Static analysis result for SHA-256 50c3f1b83f600922…

MALICIOUS

PDF

86.6 KB Created: 2021-08-08 17:02:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 68985772b40f12a731bffbb951d23363 SHA-1: 6c24ab5c17cbd966b9b69a41c87f7878eb9f3218 SHA-256: 50c3f1b83f600922baadd6191ac4d3bcef351c80707b22252306b950c41a6d3a
154 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as a link farm, with several URLs pointing to compromised WordPress sites. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. The document's purpose appears to be directing users to potentially malicious or compromised websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9336

Heuristics 5

  • 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
  • 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://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/d2e111ba802f7239c54dfdce15e0ada1/datupiwilaxipogo.pdf In PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610d5f2640bcc---rozuzetula.pdfIn PDF document text
    • http://skogsformedling.se/bilder_umeny/File/83609921001.pdfIn PDF document text
    • https://kermoulin.com/userfiles/file/35184990154.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/biuodmfj6p91u006ooalsvkje0/91557431375.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/cd721db0f7e67761f8054274e3efe520/tanofupugil.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c8fe9481a---lumefedexu.pdfIn PDF document text
    • http://groupkaishan.com/d/files/mowepobufagaz.pdfIn PDF document text
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4a57ae3ad---jewikemogugep.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9ec789736---suzitiraxasatawimokono.pdfIn PDF document text
    • https://spacio.hk/attachment/file/42874133947.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeb01b36511---funafamesavejijigisujuk.pdfIn PDF document text
    • http://farashimirooz.com/files/65424803011.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/e2kk25r8nco9gv54c6tstmboq6/nebepemumitazixedonuxexix.pdfIn PDF document text
    • http://gagutp.com/sa_upload/userfiles/file/20210610072530.pdfIn PDF document text
    • http://seabeachthailand.com/UserFiles/file/1167989071.pdfIn PDF document text
    • http://sakaryakasaplarodasi.org/userfiles/file/didilikemadinura.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a02a84545c1---26735103532.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1610901abe0421---87631368841.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/1066d4adcd2e59677bff22f474e885bf/gamazofifutitinofuxifum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=t%E1%BA%A3i+minecraft+pe+server+vnPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA1 10740 bytes
SHA-256: 99928a16e7f83a4268a5eb240852b1b1d36733b29a96261b6115471093bce3b7
font_01_sfnt_off000116f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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