Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e908177b3b506b…

MALICIOUS

PDF

85.5 KB Created: 2021-07-20 13:53:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 37f9dae3c7f709c642b3b3a7c537030c SHA-1: 096e1c9223998f812c3e34dcb33d6ed7bf9fdf64 SHA-256: 80e908177b3b506b69cab368835469c959a973cc1913d799501886bd64bfcd80
156 Risk Score

Malware Insights

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

The PDF file contains a link farm that directs users to multiple domains, many of which appear to be compromised WordPress installations or use disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to phish for information or deliver further malware. The primary attack pattern involves luring users through deceptive links, potentially disguised as legitimate content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/rqplt0n7jmi1cado3cln3o1ju2/xezivalozir.pdf In PDF document text
    • http://el-master.ru/userfiles/file/26841956962.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/8581096008bf1ada95f27e3387d38182/nomedidabuk.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/botajizexelevowunevovod.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/68e1207662b52fa05b97f56dce8ecfd9/pepukupojoj.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/6ddcba47ccba539e85e989dea68ead4a/zofexisegoroxajovum.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc21c9933f---58011810067.pdfIn PDF document text
    • http://zonwering-belgie.com/ckfinder/userfiles/files/74889241059.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/lekalizuruzusojaviratafej.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bef9f9a2783---17113907954.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2d7011c4c---wojosupatafixuviwil.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/lgmoblgsdpdans8bt32hegpsn6/98567834326.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/k462k4uue970ge5vl6k28r6tnd/32544500981.pdfIn PDF document text
    • http://goldenbaycruisesagent.com/userfiles/file/1139663148.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad93ba1b4f---16812510928.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb33e3a15e---69776720590.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/18995585694.pdfIn PDF document text
    • http://carroll1975.com/clients/4/4e/4e2b018d07aaa5a30c3e4fca1c7a8df7/File/pisujapaximuralix.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/vorebogodajobolisa.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/720351278.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/a653k556emrqn596hmk3ilkovp/fenufobowekotiron.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/xojaxovuwebavux.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607807285244b---59057582697.pdfIn PDF document text
    • http://rentbucharest.net/images/userfiles/wapipawaxoso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=lemon+rosemary+simple+syrupPDF 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_off0000ebc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC0 17272 bytes
SHA-256: 2d99dcb216b88b3746440a751d84a284e759b5aa1f2bfa566f8ab9091a8ecca3
font_01_sfnt_off000118ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118EC 10484 bytes
SHA-256: abd39d43ec8e4c9ba65f3adc745f7088f0642672c495b9e0dc923726a87b72d2
font_02_sfnt_off000130bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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