Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc2fc6a3646af4d5…

MALICIOUS

PDF

80.4 KB Created: 2021-09-19 13:15:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ce47a25c3b629bb22760ee83c47fe244 SHA-1: 45ad221a7f9baff1fd7d1690515fc426a2eca948 SHA-256: cc2fc6a3646af4d526b4c519a2ada188bfe8d7061bfea7e168f4e0f211df9ddb
126 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are hosted on compromised websites or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent, likely phishing or malware distribution through these links. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4339

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://krisoc.ru/uplcv?utm_term=change+phone+time+android PDF link annotation
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/fugugevo.pdfIn PDF document text
    • http://kenshopvn.com/uploads/files/fedavatokajetanug.pdfIn PDF document text
    • https://icnj.net/ckeditor/ckfinder/userfiles/files/39698503130.pdfIn PDF document text
    • http://www.fdconsult.qa/public/uploads/cms_files/fiwufokenesepiredi.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///wufazekuvopizinelur.pdfIn PDF document text
    • http://basumati.com/app/webroot/ckfinder/userfiles/files/40324589473.pdfIn PDF document text
    • https://www.gurgy.net/ckfinder/userfiles/files/19164978761.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161322e808c987---jadiwizadusapufurenane.pdfIn PDF document text
    • https://thegioidongphuc.net/ckfinder/userfiles/files/1316808809.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161303b1ad9e3a---50648824087.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///2021919141016577.pdfIn PDF document text
    • http://checopharma.com/upload/files/webenadunox.pdfIn PDF document text
    • https://legend-chang.com/UserFiles/files/nupovefonaw.pdfIn PDF document text
    • http://i-dron.cz/data/file/fegalezibojujananiwoxemob.pdfIn PDF document text
    • https://sunnyrosesschool.com/userfiles/file/12045764845.pdfIn PDF document text
    • http://www.vandiestbrandstoffen.be/uploads/files/41271429624.pdfIn PDF document text
    • https://xn--90ah6akb9e.xn--p1ai/f/file/wedebunobidonevipe.pdfIn PDF document text
    • https://anesaportugal.org/upload/file/fanumumugagiwepux.pdfIn PDF document text
    • http://eastcity.hu/ufiles/file/49193895873.pdfIn PDF document text
    • http://ormansagszive.hu/upload/file/finukupisuwuxiluxiginulo.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a823bb20a4---danemivepekanusegope.pdfIn PDF document text
    • https://butagallery.com/userfiles/files/doxazosexi.pdfIn PDF document text
    • https://shirbandifelt.com/userfiles/file/3957997152.pdfIn PDF document text
    • http://intersonik.eu/upload/files/vusexetadelus.pdfIn PDF document text
    • http://goodwill.as/userfiles/file/56664291935.pdfIn PDF document text
    • https://pingthye.com/userfiles/files/98281189394.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_off0000e1be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BE 17916 bytes
SHA-256: f60c86ff1b0002fdd00d9a99352fc584681062492d3b1905b451352ed6dee991
font_01_sfnt_off000110b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110B8 10656 bytes
SHA-256: 1d8d75a376e35a9a25f79d45591421ee896fab9e6244222ab7541b09bc918a15
font_02_sfnt_off000128b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1