Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0b27fa6c03b9cda…

MALICIOUS

PDF

93.0 KB Created: 2021-09-05 01:13:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 48f943a462a688fc900be295464e104a SHA-1: c0c693b1740a00863e50712b37d637e45959db76 SHA-256: d0b27fa6c03b9cda87a033e7bb0d4c911415f64c266c789eed0ea033f1afd1d0
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to compromised websites or disposable hosting, indicating a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. The embedded URLs and the nature of the link farm suggest an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://unicon-msk.ru/data/files/gisudezugefapivujor.pdf In PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9ac0265bf---87574134310.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/gizomiberebor.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/bixafuniregilanomuvexebol.pdfIn PDF document text
    • http://langfordfinancialservices.com/userfiles/files/17359171210.pdfIn PDF document text
    • https://groupunsur2.com/contents//files/duvobikuwamovenuz.pdfIn PDF document text
    • http://twgo8.com/uploads/base/files/202108280453204125.pdfIn PDF document text
    • http://ahknchem.com/upload/files/wababijirimokir.pdfIn PDF document text
    • http://thegioimaychaybo.com/app/webroot/uploads/files/tovixujolil.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16091cdf046427---finebirebigobe.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a131083baea---ruludepeb.pdfIn PDF document text
    • http://robbinsfamilyhealthcare.com/clients/2/2c/2c787fa606fc56c3a3a24dfc5409695f/File/84597445336.pdfIn PDF document text
    • https://thehideawayresortpattaya.com/userfiles/files/82456825819.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1cf5a19ae---memanidasodupotudu.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/lakinijibevasujifoku.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16094c2651406c---31530933176.pdfIn PDF document text
    • https://eseninternational.com/uploads/files/tutevisunofa.pdfIn PDF document text
    • http://sakesushilakehavasu.com/uploads/files/18524644294.pdfIn PDF document text
    • http://thecargonepal.com/userfiles/file/93949581316.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fdeslprj7ttmqpbgvrl57to9c7/16541892157.pdfIn PDF document text
    • http://alexforstarlight.com/clients/4/41/4125d763bdae894b2c088b8c4c0f4705/File/1712728437.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/1609b058dd7e91---mebebaxeke.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b23a9d12d77---30796441314.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9c7bbfbc0---niwafenovobitededere.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=notary+public+florida+manualPDF 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_off0001077b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1077B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011f8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F8D 17536 bytes
SHA-256: fca5996c3b3bfcbc01ccba3d668218a0c5aaa761951a90e2cc97287f7346a85c
font_02_sfnt_off00014d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D3E 10812 bytes
SHA-256: 5fdc7402cbb0fd5407229cc739c770dcc38d2a09e20f501e259f90269979d630

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