Malicious PDF — malware analysis report

Static analysis result for SHA-256 63778cb5c48c6f11…

MALICIOUS

PDF

201.3 KB Created: 2021-07-20 11:49:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: df4a2b9fb12cbd0b7c9891ca88c5f3a1 SHA-1: 8676eb290c03ab21aa4b1a3cdaca19b1c57f210e SHA-256: 63778cb5c48c6f11cf1a442df2bfe0b28bbd546a01b501b035bef5d9535c845b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a PDF link farm heuristic pointing to compromised WordPress upload storage suggests the document is designed to redirect users to malicious content hosted on these compromised sites. While no scripts were extracted, the embedded URLs and the nature of the heuristics strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9828

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://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/1c8a595c0cd93f2f3343640c2d2692fb/31704988911.pdf In PDF document text
    • https://mariellatriolo.it/public/file/wuwisubejitalelivagoruj.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/ce3b1180e6afb9394555e4afce8419ef/47907358265.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160de8a321404a---xisafizonu.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096104e8280b---togax.pdfIn PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/vrtuur15p3tpcil66thutgcgpr/11493572412.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/paripamusomomiw.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160f2a5e9a13f5---wunaguvugewudidugovu.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821030a5bf7---26720281728.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/16094681e4bf21---23906207791.pdfIn PDF document text
    • https://kuni.ro/app/webroot/files/userfiles/files/33358029651.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080619976cec---gatufimozaxedugutusepuk.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///kumifewovi.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608638680140c---topoxuxosokubi.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160a9ebbbc8b13---seveg.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16078df37d588a---tixalapolomobidijiwow.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a37b84022f4---29786316648.pdfIn PDF document text
    • http://seoulmenu.com/uploads/files/90110282003.pdfIn PDF document text
    • http://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/39335651310.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160864e3c3aa1b---neparanodakitabowoz.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/026671e849c4ec00cbf47314180fcfab/1296263535.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073756bbdb22---rovixelagugoturavuvurupub.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c0da53b2c---18120087375.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=4+pics+1+word+level+308+answerPDF 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_off0002b293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B293 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0002caaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CAAA 11096 bytes
SHA-256: d21716d7736ddbb9885d5bd761e1f92af4aa7cedd58f4e068f357c28b68234cb
font_02_sfnt_off0002e4bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E4BC 19188 bytes
SHA-256: e36d58d2d613f6e24ab06d43cccab8828350ce1991ef879ea70994e5c836f48b

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