Malicious PDF — malware analysis report

Static analysis result for SHA-256 b614379fd18acdcc…

MALICIOUS

PDF

77.6 KB Created: 2021-07-09 22:11:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0e296e766093aaf4e4ab18219f1b53a8 SHA-1: dc215c7c59b63f6b7d294d6677d5790f9fa60a9c SHA-256: b614379fd18acdcc1fb91528915f693bc395b98331160efa8b23275fdc66a1f7
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The primary purpose appears to be to lure users to malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 http://dongtienlamnghiep.com/upload/file/suvetewawuzafikusa.pdf In PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/65778659441.pdfIn PDF document text
    • https://secolink.sk/userfiles/file/89424887061.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b23b391a930---40895958212.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608c55f9ca208---18459380976.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/30348b3a3eae1fdccd6919e21363ed41/70367917431.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f94d78f312---16376291093.pdfIn PDF document text
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/67835266958.pdfIn PDF document text
    • http://benthanhsgfarm.net/images/uploads/files/62002578815.pdfIn PDF document text
    • http://exoticland.bg/upload/files/files/karuvituzadabizakavuz.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16084c40c5d311---60631116026.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/e18p7h6q8il25as6662uqnd9pm/getisipevovotavela.pdfIn PDF document text
    • http://indel.sk/userfiles/file/93694459847.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607efa296844f---20981019908.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/5200e063142f858011f97f1e8aecbadd/xelunumozi.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/5d53102104013db44e249a325020af06/86711715301.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b022b98a202---46563847638.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/2021510220527926.pdfIn PDF document text
    • http://stpatricksreunion.org/clients/84553/File/32292765239.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/03971fc682819265e7fc349a369ef53b/tegigotixurizatatawuruni.pdfIn PDF document text
    • http://daeryuhealthcare.com/ckupload/files/30772919954.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/66ef2d3faec884b245d90b7316ee57c7/rineki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=imperial+to+mmPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE697 17008 bytes
SHA-256: 070fed32c30aa54d78a877de87e2cc830c4d4a49e01b54881e45fe84abd2b365
font_02_sfnt_off0001133a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1133A 10092 bytes
SHA-256: ee997f3c728ad8e6900ed49297f413799ad75bc469295de96bf50abbd828a343

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