Malicious PDF — malware analysis report

Static analysis result for SHA-256 7373c380264786c8…

MALICIOUS

PDF

164.9 KB Created: 2021-08-15 10:45:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 56608244e94fc05adf3fb690c6cd7ddb SHA-1: 77053d15f1cfc9579ba810abe8f405174eae9276 SHA-256: 7373c380264786c8532231e92b7f2378e94d629d96f1a0c463295900722625af
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites and other disposable hosting domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature. The embedded links suggest an attempt to lure users to external, untrusted resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://giovanninociti.com/userfiles/files/33579632114.pdf In PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/npgr1rbqutgjesp8lan2unih92/81322256261.pdfIn PDF document text
    • http://goozzl.com/userfiles/files/38828994148.pdfIn PDF document text
    • http://arredamentoambienti.it/img/file/31533257823.pdfIn PDF document text
    • http://flywings.sk/UserFiles/file/mowoduxoxozilapefun.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/af23018685f44ee6c68e17e8705eaac8/wojirujegam.pdfIn PDF document text
    • http://strandedtattoo.net/file/koturidoxuzavotetabur.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/5u2hqfu5t2asn50estm5u0v3ko/botukigoxowivatifizil.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160833c9758450---49241159444.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/777ea23cec76e7ff860aae39429b1254/kiremazuzovuwepos.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a079d04cfff---59373571676.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/043f0068aa83051e0972657a89637640/33724788106.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16081b5f9526be---galopepimij.pdfIn PDF document text
    • http://makinsushi.com/uploads/files/xusisorenadewosedegirupa.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/bf6663030609e107a5a9100e60a1234c/subojomufijimapepugosetap.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ac119229209---90550522753.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a65bdf521fb---wetipalatavu.pdfIn PDF document text
    • https://bselink.com/userfiles/file/21531110423.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/fulasana.pdfIn PDF document text
    • http://flexicourse.cz/res/file/zutilex.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/16072dad588f0c---27053667278.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/23609777093.pdfIn PDF document text
    • http://mixline.ru/img/lib/file/tibarizekanis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=us+history+shorts+2+answer+key+the+automobilePDF 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_off00022176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22176 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00023988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23988 19180 bytes
SHA-256: 51f6122fce9a64119b6b085e39c7de664927c16bc543ff9a06943d641fc7ad69
font_02_sfnt_off00026b26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26B26 11032 bytes
SHA-256: 85a32fa88dea68d5d459a18005997ae148bea28ff2ec211374522da1e4d9a919

Open this report in the interactive analyzer, or submit your own file for analysis.