Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4f0c2bdcae3c2c2…

MALICIOUS

PDF

70.3 KB Created: 2021-06-07 06:27:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ef09020611ed0bffd05eadc5d3477d76 SHA-1: def0f83e1c67afbe7f5a8be5c486fa4f47e62c0c SHA-256: b4f0c2bdcae3c2c27a293f991520e494c603873065211debb38fab0f8715ba3b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is classified as malicious and contains numerous links to external websites, many hosted on compromised WordPress installations. The document body, though heavily obfuscated, suggests a lure related to reprogramming a clicker model, likely intended to deceive users into visiting malicious sites for phishing or malware downloads. The presence of multiple distinct hosts and the use of UTM parameters indicate a coordinated effort to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8726

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://crewmak.ru/uplcv?utm_term=how+to+reprogram+clicker+model+klik2u PDF link annotation
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f898e6aab6---gufudesifuliwarisa.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b2716e6abb9---duwuxojisom.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/7d9ddca156e9a5e47a6892ab16de8890/kuwugamijuzatumumujed.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3c210bdb0---kimulanesaparikas.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210507091906_1845635999.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/435a3d9ad973b40bcecf40d95b1e930d/xuvibutivimirupaz.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160899b4fc3221---61890523329.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/fbab41abf935516abf2e54038a1b61f5/vuresa.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607a703dd4a1e---tifudofasulepixaranepodek.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160787d09c20d9---kuvosuzalotaw.pdfIn PDF document text
    • http://thetsaban3watnuea.com/UserFiles/file/5989757731.pdfIn PDF document text
    • https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/c2bfd262c2e35873f55f435b57cff426/61508442671.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/56a54d8e3b5898aa4dd43ec8e8849f20/18855756044.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/f85e3d51baf02863ad797ec87711fef4/munob.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/554a11c07919fe72436a35fd3954fd4e/zasajexinudegoz.pdfIn PDF document text
    • http://aisef.org/uploads/userfiles/file/file/76796222860.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn 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_off0000e6f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F9 5464 bytes
SHA-256: e627fbcaea3e18b47ff8e51d01af0d7e32f7ea978a27035c194bbe47c6fb02d5
font_01_sfnt_off0000f98d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98D 11364 bytes
SHA-256: 4acdc5b764c9d21e41ff0e360a2e94b08e40e06a8af5ec3dc2dfdc5356e62e71

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