Malicious PDF — malware analysis report

Static analysis result for SHA-256 adac0fb18f768e10…

MALICIOUS

PDF

258.3 KB Created: 2021-06-11 10:51:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7cbede7495e60d8e9e30496b555e4f1 SHA-1: efd6465b3bb556acc573ae69d23ca4a29fd36c18 SHA-256: adac0fb18f768e10bb62fee1faf2f739d7984a9f1bd5836805923e366c6cb0b4
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which appear to be compromised WordPress upload directories, suggesting a phishing or malware distribution campaign. The document body, though heavily obfuscated, suggests a lure related to 'static electricity of scotch tape lab answers', likely to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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.
  • 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://oniceh.ru/uplcv?utm_term=static+electricity+of+scotch+tape+lab+answers
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607424dca4f6c---78709633975.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/701327afe2ed563db79bd154a7661b0d/silopebebuj.pdf
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/278a1d4bfeed40168e4dc41d78b1a2fb/12848314359.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/9e6c56b460c694fd7e7d9948b8da951c/16308109679.pdf
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160705498f28c3---956044138.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/h40h0pme00e7tabqotcr66mmhs/12505916422.pdf
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/te8ncjpnq8r270r5u8knd3ptf6/45860556407.pdf
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/dab0a3e56a31be40cbadca6c4a258df8/2914310495.pdf
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/44iub8el8vq381d6rfkps7iok2/973228126.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c465ac4f50---mixagutikala.pdf
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a09baa1ffe---63155068553.pdf
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/1j63q32d1scva7qkrgepolg63l/20382387756.pdf
    • https://atphp.ch/userfiles/file/60914332598.pdf
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077a39f3e031---48784433462.pdf
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/ffd05979eedfcd009bb65e90f3e70d5b/44341163270.pdf
    • https://uniqrelation.com/userfiles/file/zisifa.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b87e5dd82d5---26625838785.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/dd9087515771c2ec3e4a53e2d61fb148/jolonokokirufukorovebizo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003be3c.bin
e208282fdd4db4521386666facde5359c4891709dbaf15bbe71353b2f319ec7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3BE3C 5540 bytes
font_01_sfnt_off0003d125.bin
7c77b459a774b1c79191b708a333118cfec2230679e9bcf732fb3721fd438d2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3D125 12468 bytes

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