Malicious PDF — malware analysis report

Static analysis result for SHA-256 6930a9770ecce635…

MALICIOUS

PDF

120.1 KB Created: 2021-07-06 15:48:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 927107878033342f859e7f5efa3ac9f8 SHA-1: 54af1a3c746c43d20989ea7c4a9f9fcbf684cbd4 SHA-256: 6930a9770ecce635d212f8b5364ddbc9edbf05a04ec49d557ebc511f9c39e131
156 Risk Score

Malware Insights

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

The PDF document contains a link farm with numerous external URLs, many of which point to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The primary attack pattern involves luring users to click on these links, potentially leading to credential theft or infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9719

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://factinet.com/uploads/files/bixulimajajures.pdf In PDF document text
    • https://kingcarmotorista.net/uploads/files/saloxa.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/e865506261e93310cfd5184fbbaa852e/70121010540.pdfIn PDF document text
    • http://southfieldhigh.com/clients/a/a2/a202dccd336a30abee2d0a4364b9f07c/File/34181157269.pdfIn PDF document text
    • http://musicupclose.com/clients/f/f7/f7c291dfb329fbc33054893077acf627/File/sitisufumovukuvalunu.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c65601638ac---wesaparodejaxevadada.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/wuxegodogolilebeniwokas.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a634cd00ae7---gekadewafelo.pdfIn PDF document text
    • http://beiwendq.com/userfiles/file/34921873066.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/68428773280.pdfIn PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/96d2ico2qmkmb261f1f1nr14v9/5985424604.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/057a090f79b93c0030f9c8e138e8ebd7/23100046160.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/oopiol5gik12sm1nujdfgdum2v/33990241564.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/17286664279.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/947b1ece86b5461f9eedb61f0924dd3e/vewunakoxewetobejafaje.pdfIn PDF document text
    • https://isosklo.cz./uploads/kisonasejafev.pdfIn PDF document text
    • http://unioncentralreunion.com/clients/3/3a/3acd25563584ef55397927d4124196c4/File/38663481757.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/nuzivoxazofazixogi.pdfIn PDF document text
    • http://peoriamayorprayerevent.com/clients/1/16/166e3f524b51ec168ebfd48f86188a1d/File/93572427752.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/jmnfk4nbvaijuc9ime3kc8g8kv/tapidusanofenitit.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/v755irn5l962dehti3fl4boro4/gaxiwejabubevanujoma.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a49dcac2066---weruxobovi.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/35fc48d300d1b7060ba4183260f45c53/76226150477.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/6u1dsub9kutml79v9e5eosq8q6/7585069567.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/mukomojabojuwizive.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160df7387b9104---29787300855.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=answers+in+genesis+kent+hovindPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015d09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D09 10544 bytes
SHA-256: 3408b25a2cdf1c366464a95e48314a223a6d5e7d9b25020395eec83037453fa6
font_01_sfnt_off000174e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174E6 16692 bytes
SHA-256: 42ec858f21ef0116761322cee7b0e5065cd1b26597419b0d8678e5ed57723a4b
font_02_sfnt_off00018ca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18CA5 17504 bytes
SHA-256: 5b98498516d57e079d8545f1e2bf27f72a71524daf81c31a80cec06bfcd49419
font_03_sfnt_off0001ba0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BA0F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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