Malicious PDF — malware analysis report

Static analysis result for SHA-256 d36f8ac9f52914e7…

MALICIOUS

PDF

96.3 KB Created: 2021-07-14 04:47:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 24be4cfabdcbba6c59133105e598d65c SHA-1: e28ee212aa5001219eff517f176d05ab4367c4b7 SHA-256: d36f8ac9f52914e7af68de2e63cd6acb3368c0a21d938a578573c2724ca24eda
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to compromised WordPress upload directories, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing lure designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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
  • 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 http://dichvugiayphep.biz/upload/ck/files/tanuwokemevol.pdf In PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b12f4f758a7---simowapakezozubos.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/737e2df10b3b8440c859886c8e495800/54048717861.pdfIn PDF document text
    • http://piotrkowska77.pl/zdjeciafile/radipuraginoxibevupirem.pdfIn PDF document text
    • http://watthaistuttgart.de/userfiles/file/nenelomosigevig.pdfIn PDF document text
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/bc5341002cafd3e4701616972b9602a4/lareperujarefesusujusu.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/b3153bb1e50ac902a1825672080d908b/gajekalakeroz.pdfIn PDF document text
    • http://mamnonlittlesun.com/upload/files/42311643379.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6e38a28dac---83828094814.pdfIn PDF document text
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/f6f2652ae47c12b90a10ae08ea61a0f6/94340525528.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c71a980d35---navepidigulazemelosadoxuz.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/d097102880652d089b8e51d234b95a3c/vijepisibopibotiku.pdfIn PDF document text
    • https://willmarlakesarea2040.com/ckfinder/userfiles/files/xomobenuramoguloja.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/71cd14380f5ff5eb1f9374cea57f428b/robarekogeg.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160830c90e4a29---kusoduwad.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/d1c6131778a2e8ceee24ceee99acfb4f/rulomozekojazimavudukizi.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2881143771---11564676186.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/t0kfprhtkinnfaa1gbdbuab3gp/6341410609.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b004ae68889---redisokud.pdfIn PDF document text
    • http://sns.hu/_user/file/38701528239.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/jazivarudojabevivebel.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c016cd0f5---57814348908.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/sujav.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/liwefojabotedafuse.pdfIn PDF document text
    • https://www.truemark.dev/PythonIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=python+interview+questions+and+answers+pdfPDF 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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F61 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12778 11064 bytes
SHA-256: 2c7458dc93c65b849c1edd966f298655441ab119f0461b7adda931815d689d26
font_02_sfnt_off00014112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14112 18980 bytes
SHA-256: 34b47c804fe84bc23d5311cd4263397997bfedca838c4a84c7a19fbeb1013631

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