Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1e2614e537d697c…

MALICIOUS

PDF

83.4 KB Created: 2021-09-05 15:35:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: bf52c7c0d17a305e6d1b3b40156e3142 SHA-1: 7f118384ec4acb87a64a71cc4f20c0a88c9f310a SHA-256: f1e2614e537d697c183afa3ded440a8782111d23dd755a2e6ca4d759ce5cb574
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads, suggesting a link farm or phishing lure. The presence of these links and the overall detection pattern align with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://taxiporec.top/wp-content/plugins/super-forms/uploads/php/files/lr4utnbm2ai220l7fe1mp2d089/61363388717.pdf In PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/175774c1e8d90279111df3ab5641c08c/fofasezutedede.pdfIn PDF document text
    • http://eska-lift.ru/userfiles/file/lojonikofesu.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609db627930a6---87801918519.pdfIn PDF document text
    • http://nujhimachal.in/img/uploads/files/zulob.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609155e713460---velijuwogegalotufemejazo.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083e1d8db13a---zirazosadava.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad23e57f425---46648566657.pdfIn PDF document text
    • https://seeandhearbetter.ie/img/shop//contents/37489178642.pdfIn PDF document text
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/53359727578.pdfIn PDF document text
    • https://sonerofset.com/userfiles/file/74658657812.pdfIn PDF document text
    • http://flywings.sk/UserFiles/file/mulufad.pdfIn PDF document text
    • http://tulsamemorialclass1969.com/clients/8/8b/8b8b36ecbaf17f244e47af75a29dfbe2/File/49771359655.pdfIn PDF document text
    • https://sitycare.com/FCK-UserFiles/files/xepisa.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/231kklaba2eucmei8kfce7uk4q/kijizixupomijerufidukux.pdfIn PDF document text
    • http://fkjz.cn/upload/files/2021/06/202106290545596750.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/5946252c897f325730f7262504c530f2/95296228227.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/16089c2b18c2ee---25054259965.pdfIn PDF document text
    • http://kamerton.nl/clientfiles/74784376966.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcdffc2c610---2270163809.pdfIn PDF document text
    • https://bompentax.com/quangbasanpham/app/webroot/upload/image/files/sovekoturefeludimepob.pdfIn PDF document text
    • https://abhimaninteriors.com/ckfinder/userfiles/files/vulevo.pdfIn PDF document text
    • http://hydrem.ru/images/file/pelijitaxafipite.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160702f7204100---bipukofuper.pdfIn PDF document text
    • http://csc028.com/userfiles/file/20210704035135_bsep0u.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=english+grammar+exercises+with+answers+for+beginners+pdfPDF 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_off0000e043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE043 17756 bytes
SHA-256: 13aa0fd2aa13ee1b7243ddaed1db61e4fa4add9bb314ab2ea2aacb56f72ba6ed
font_01_sfnt_off00010d81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D81 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12598 11380 bytes
SHA-256: 4193249baa978610543155b73d0e2ee6629604397d413e77dbb8e230cb57b715

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