Malicious PDF — malware analysis report

Static analysis result for SHA-256 8be497197f851c1d…

MALICIOUS

PDF

68.4 KB Created: 2021-09-30 19:11:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9ab37bd1aa7cf6a1831c6e8d145c4ede SHA-1: 71609868f5bab1214022240d93acd942857126c4 SHA-256: 8be497197f851c1da3a3f7e1b975034722105def2d166853cf90a1168d0fc06d
156 Risk Score

Malware Insights

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

The sample is identified as a malicious PDF by ML classifiers and ClamAV. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The PDF is likely delivered as a spearphishing attachment, aiming to exploit vulnerabilities or trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://myclubowners.travelenvogue.com/userfiles/files/52709684856.pdf In PDF document text
    • https://evpersoneli.net/ev-personeli/file/61682740960.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/36002327156.pdfIn PDF document text
    • http://indianamartialartsfitness.com/flash/indianamartialartsfitness.com/file/28549161826.pdfIn PDF document text
    • http://medicom.pl/userfiles/file/91589474414.pdfIn PDF document text
    • http://randygordonlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sosetutuxukujoji.pdfIn PDF document text
    • http://kiddeefire.com/media/userfiles/files/17561594323.pdfIn PDF document text
    • https://pmms-online.com/assets/file/releletujusovepip.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161383cf3c325f---28563240484.pdfIn PDF document text
    • https://jechrina.gr/FCKeditor/userimages/file/fupepomogimevife.pdfIn PDF document text
    • https://euronuts2009.ge/files/files/gifexova.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/71767071654.pdfIn PDF document text
    • http://lgassociates.in/uploads/zigun.pdfIn PDF document text
    • http://etre-belle.su/images/file/90734758195.pdfIn PDF document text
    • http://osayit.com/images/file/vemezej.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/8be0454bb7a0a10324e99b2915daf41f/mabamovefav.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/c7798c14b56ccd7275d69e6d76353ee4/vosewuri.pdfIn PDF document text
    • http://1472bond.com/upload/Fckeditor/file/wobexovezibujexeg.pdfIn PDF document text
    • http://osteriadelcampanile.com/userfiles/files/tonivuwuwu.pdfIn PDF document text
    • https://classoft.ro/userfiles/file/noniguf.pdfIn PDF document text
    • https://nsaimmigration.com/userfiles/file/jadiwagaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=may+god+save+us+movie+online+with+english+subtitlesPDF 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_off0000ab52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB52 11096 bytes
SHA-256: 235cf3241d5f823360501c5d9f390a8c295576e5de77d5d17575aa148625863c
font_01_sfnt_off0000c4d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4D5 15564 bytes
SHA-256: 897c246dce7c76100ba751bda902a65c8d1512292628789a6ba1cdf822a6e6bd
font_02_sfnt_off0000ebe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1