Malicious PDF — malware analysis report

Static analysis result for SHA-256 282e34e82dac445b…

MALICIOUS

PDF

89.8 KB Created: 2021-07-10 07:32:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2df4deeda7b8aee07cf28557af7a9033 SHA-1: 7f9e80f82645993cb5736c371a28baf022cfd671 SHA-256: 282e34e82dac445b9deb3dc2093545dcbde941cf23e90412d1529de71a385ef2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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 https://crysiq.ru/uplcv?utm_term=do+i+you+we+they PDF link annotation
    • http://anthonyvienna.com/sites/default/files/file/64831722261.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be264301e2a---bewamavojid.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/77654201092.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/74715485886.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/8d0709c8d6d15a24fc436c08324d5afc/77837405749.pdfIn PDF document text
    • http://wittlich-luexem.de/userfiles/file/nemamefidavunofolenuwumad.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/cee99a9665009690ec552a9c72cc6e29/8521169244.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/883eced9b7e68c56b343d64690afa30c/55547095064.pdfIn PDF document text
    • https://micro-churches.net/uploads/file/98931761090.pdfIn PDF document text
    • https://walkandsmile.com/userfiles/file/bepenevigav.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2ad7b314d---fewedoxerimebemekupel.pdfIn PDF document text
    • https://plasy.com/uploads/file/wobemefasutedapi.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d97018cea8---punogowofisojazusulurirur.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/62717430298.pdfIn PDF document text
    • http://vitanova-cattery.com/upload/file/vubulilo.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/d61c9e4846a9c201e504fee1058ca0b0/35014510484.pdfIn PDF document text
    • https://footballsod.com/images/ck-uploads/files/nekozonetar.pdfIn PDF document text
    • http://dui-antidote.net/images/userfiles/file/16230182068.pdfIn PDF document text
    • http://urjabatteries.in/userfiles/file/63724948188.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/84440285015.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d279dd062d---34299215624.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608211e0308bd---3237848261.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/18044770991.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/d72de295c19e9aa8ed8a5dadae62b9cc/56861120409.pdfIn PDF document text
    • 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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e45d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45D 19468 bytes
SHA-256: 516a4e1e9705beba35ac8159c5b8ae88d18680eb250ad4305a83286a09a7bd0f
font_01_sfnt_off000113cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012be5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BE5 9924 bytes
SHA-256: aa2f2cde756bec737876a5c0666ee2c1fa69857d6f581ea53015cbcf8debc5fe
font_03_sfnt_off00014209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14209 16312 bytes
SHA-256: 7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae

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