Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c0f99e9a6e662eb…

MALICIOUS

PDF

87.3 KB Created: 2021-06-29 07:30:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 2dca548fde91703dc205d00ac22a489a SHA-1: 2915d1abd6a74c00c3a488155c180a2acbbfa0dd SHA-256: 6c0f99e9a6e662ebe88e6d6b068665ebd7d88de59f196925f4733801f983a8cd
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links pointing to various domains, many of which appear to be compromised WordPress sites used for hosting malicious PDFs. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the structure and embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://catamma.ru/uplcv?utm_term=free+ocr+software+for+pdf PDF link annotation
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/9ebd6fe668oa0eujdj5ib8mcm5/mumojomowowidowaw.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/58221ce39cc3245d5291aeebfe3f91f5/jitasomula.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d907f577af---77304631559.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/3263oa5i5iipvedmg42f7d5on4/molivefarozetoza.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/86586186448.pdfIn PDF document text
    • https://vnnc.vn/img-hdmedia/files/2306314389.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/5dc4ec75af6db746ee224787cd3382b1/80969610022.pdfIn PDF document text
    • https://piataafacerilor.ro/app/webroot/files/userfiles/files/30402729508.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/lo7cl0b9355hrl5bjsp14bj466/rejur.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f40da2e319---350044828.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/sonupavepogusarofanoriril.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/c9b53ff329daf1ca242fc2cad8164546/3332764182.pdfIn PDF document text
    • http://www.aluvascientific.com/UserFiles/file/18547343874.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/22ad9e08cc1ccfef746dfdfa88313f2b/62036387486.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/290f38fae8d942f189776feeb3d929b4/29033532781.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/2cgmepovf4n1jrg7qrovihqpn0/buvovakex.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/redolazuluxuzusofi.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/1263f23934bb27295b1e66d5806ff95c/lisazu.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607955219041f---kikugawamujitoruxuk.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/151ae06f9b1ac4967f2e08a789965076/19970704480.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/berobexekiwukuwilejox.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/dca350976760a835d387807b23d40c70/55785763480.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/kaxedav.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf205ae5f56---powikemu.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c68c1a8dcd---72936680554.pdfIn PDF document text
    • 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_off0000f0fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FE 17376 bytes
SHA-256: 03f2b9b786d72a7c68620df91965e5f073ed25fa3dddeab7c9105ad10cdc2762
font_01_sfnt_off00011e4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E4D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13664 10436 bytes
SHA-256: 39d3efe3e6df0263936e6d1702c09e7368307fe6a4276656ede4406d7b6af709

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