Malicious PDF — malware analysis report

Static analysis result for SHA-256 5746961c89597ed3…

MALICIOUS

PDF

71.5 KB Created: 2021-09-02 19:54:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 608817acb55edd75ea5a438470f9e274 SHA-1: c811a157b53b92ea62b3f1f643f7e7bff24f777f SHA-256: 5746961c89597ed3e1738eedc1d51cb3d8b09fd6aae661a2129b0ffb6aff8e9f
154 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting it's used to distribute malicious content or phish users. The embedded URLs, while numerous, are the primary indicators of the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8295

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 http://logo4you.dk/userfiles/file/mizowiwisonezopemujasojus.pdf In PDF document text
    • http://sugarfree-gelato.com/upload/file/38921104545.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/36061439309.pdfIn PDF document text
    • https://mt-creativestudio.com/ckfinder/userfiles/files/tepavegile.pdfIn PDF document text
    • http://girisimcilikproje.com/resimler/files/18182184571.pdfIn PDF document text
    • https://macronew.com/upload/files/72849601268.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608ccee23aa50---batolejudavupogobos.pdfIn PDF document text
    • http://stl-hk.net/userfiles/sogeredapewi.pdfIn PDF document text
    • https://cqc-material.com/app/webroot/userfiles/files/43556452413.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/ntbr22tenr4q82kohfdsc5ud3j/dovevafutega.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/8529ee8590489b52ca2b974a59c8e355/vugurimuzinoluk.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160c8fb160a142---99029875863.pdfIn PDF document text
    • https://alasclub.gr/neuro/ckfinder/userfiles/files/35854413197.pdfIn PDF document text
    • http://xaydungphongphu.com/uploads/files/nerulutaseposezog.pdfIn PDF document text
    • http://ituor.ir/basefile/chartermeinfo/files/mosidilegafonodetot.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/60106866600.pdfIn PDF document text
    • http://kyanite.tv/userfiles/file/61799257751.pdfIn PDF document text
    • https://emmaushuis.org/pages/61622898848.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/pukem.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b77abec9ea0---66598484841.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/e36c475e465114d1a17100cb5bbd4418/55145858757.pdfIn PDF document text
    • http://teraval.cz/res/file/6386686099.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/rexabukubogobowufot.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/27732083932.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=convertir+photo+telephone+en+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d55b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD55B 10360 bytes
SHA-256: 802e093f7121cba5c03d15de3ea1ace90441b41e59958d7dfce3e6641a9fc3e2
font_01_sfnt_off0000eca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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