Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb56cc4527827a1f…

MALICIOUS

PDF

75.0 KB Created: 2021-09-22 12:25:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a437bd6ea9f6b4e69174bb948eec2382 SHA-1: 854887d0b3537833fd302399653efb01fae20ff9 SHA-256: eb56cc4527827a1f5b59279d470abebb402e3711cf7e33658e4efc857516882f
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a high ML score and ClamAV detection as a phishing trojan. It contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable domains, suggesting an intent to redirect users to malicious content. The document body is unreadable, but the presence of these links strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/161479858bbc7b---9294502378.pdf In PDF document text
    • http://lamelove-zakryti.cz/userfiles/file/javakadusiputod.pdfIn PDF document text
    • https://nocenzura.space/web/img/podborky/files/47306255610.pdfIn PDF document text
    • http://2017.letnifestiwal.pl/ckfinder/userfiles/files/45198908971.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b4623233e4---55219940116.pdfIn PDF document text
    • http://geonatlife.es/ckfinder/userfiles/files/wuzug.pdfIn PDF document text
    • http://abc-tel.ru/data/File/53583577037.pdfIn PDF document text
    • http://maekuangudomthara.com/ckfinder/userfiles/files/51183233728.pdfIn PDF document text
    • https://asiarsolutions.com/userfiles/file/sebasejerubikezoduviziwum.pdfIn PDF document text
    • http://strelnicebudejovice.cz/userfiles/file/toxigutelunaf.pdfIn PDF document text
    • http://yousefmaktabi.com/ckfinder/userfiles/files/zafuminu.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/16141e07b6b412---wigevemeruxozarim.pdfIn PDF document text
    • https://dveropolis.ru/upload_picture/12400730837.pdfIn PDF document text
    • https://guapa2.com/admin/fck/file/pesafetisomozajozubifenap.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/10324e0c39d54b980314fb1fed4f86fc/67096811255.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/h0p6ggr9el70ancgq3crmpetb1/79037291187.pdfIn PDF document text
    • http://idroter.org/userfiles/files/14073854261.pdfIn PDF document text
    • https://abhrian.com/userfiles/files/bowajubulowovutudex.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135e38c14ae9---45314341632.pdfIn PDF document text
    • http://gpsputhuppally.com/userfiles/file/rojaxixivuzutusozori.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=scroll+animation+android+examplePDF 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_off0000bf5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF5B 17784 bytes
SHA-256: 3188f715405b2221047560fe07f977137cb7d1d4448c6c23a2391a32fd94d876
font_01_sfnt_off0000ee12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10629 10684 bytes
SHA-256: 69edad0bd69becf2b383eb2bdd13d1bf997bc8c8571511f6edf47a393b58d0da