Malicious PDF — malware analysis report

Static analysis result for SHA-256 3896ed8da0063620…

MALICIOUS

PDF

81.3 KB Created: 2021-09-12 18:07:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3181ed10f7463e752fb5d534dbd8538c SHA-1: 8c5edcfc3c9a84307ef200110f7d99c1f30ab2b2 SHA-256: 3896ed8da006362037469406de9ca90f49df6c42e293db192c8c722cf62f03f8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. It also features link farms pointing to compromised WordPress uploads and other domains, suggesting an attempt to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/00dff2psoucpj2180gi12u9vfl/guvadodopovovurora.pdf In PDF document text
    • http://tg-focus.ru/userfiles/files/2029665214.pdfIn PDF document text
    • https://blueparadise.pl/userfiles/file/71123853190.pdfIn PDF document text
    • https://www.milestonesmn.org/ckfinder/userfiles/files/porapomabij.pdfIn PDF document text
    • https://rrrc.us/userfiles/file/78834336556.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16139e04895785---19478675805.pdfIn PDF document text
    • http://chieusangducphat.com/uploads/userfiles/file/9254815211.pdfIn PDF document text
    • http://hcstonetw.com/uploads/files/202109042300322973.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef9d3e5751---21224702007.pdfIn PDF document text
    • http://geluidsadviesnederland.nl/ckfinder/userfiles/files/posufopemefapuzarif.pdfIn PDF document text
    • http://119pump.net/d/files/kubufukulomenoxubawidul.pdfIn PDF document text
    • http://montpellier-businessplan.fr/mbp/upload/images/images/upload/ckfinder/boxunut.pdfIn PDF document text
    • https://cosmeticdermatologymiamibeach.com/uploads/data/files/rofegezeraroxod.pdfIn PDF document text
    • https://pasarantogel2.com/contents/files/zupolebosijazixepuwu.pdfIn PDF document text
    • http://hotspot-usa.com/js/upload/files/xukofadoredirizuwokurep.pdfIn PDF document text
    • http://parateam.cz/file/jowozilog.pdfIn PDF document text
    • https://detskeihriska.eu/ckfinder/userfiles/files/vinipejedodipudexudalojo.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/jepebifozenakeri.pdfIn PDF document text
    • https://mondoaudio.it/img/uploaded/file/79376665586.pdfIn PDF document text
    • http://plenerowe.kbo.pl/ckfinder/userfiles/files/delexizudapumetuka.pdfIn PDF document text
    • https://dom4m.lv/userfiles/files/37478731146.pdfIn PDF document text
    • https://encoyun.com/calisma2/files/uploads/nuzexej.pdfIn PDF document text
    • http://kassa.pl/userfiles/file/83387775300.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/8ebe0d8799d82aa54d298d965496b749/fufakelepejebof.pdfIn PDF document text
    • http://lafenicealcamo.it/userfiles/files/73926881618.pdfIn PDF document text
    • http://www.gulbaharsigorta.com/contentData/file/luzoroxa.pdfIn PDF document text
    • https://theptaynam.vn/upload/files/94601235317.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133ea901fd4c---kuzaba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=alpha+messenger+chatPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2FB 20216 bytes
SHA-256: da15e215e71f3ac343a53898d49f76af16537f2e6685729fd44ed586f32fe293
font_01_sfnt_off000106d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011eef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EEF 10588 bytes
SHA-256: 49b4091202dbedc5fc488486ec034ddd6aa187ccd9e0e0c473a21dc91a658e00

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