Malicious PDF — malware analysis report

Static analysis result for SHA-256 996e743f5407880e…

MALICIOUS

PDF

87.7 KB Created: 2021-07-01 20:45:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: ebbf1d4f9a23559f0609dbb7b456f498 SHA-1: 6580a1f1d7670e359cbceabb182e8cf89a58bbe0 SHA-256: 996e743f5407880ecc3b619d8e81eed9024e7de751ebd817479b6d80a443211e
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm or redirection mechanism. The document body is heavily obfuscated and unreadable, but the heuristics indicate a malicious intent to direct users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0f9046f3c---xinotebuzafipuxavawulo.pdf In PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16094634a21742---43894475790.pdfIn PDF document text
    • http://benevolo.it/userfiles/files/rupulinipanut.pdfIn PDF document text
    • http://harryreichert.de/uploaded_pics/News/file/wonopuxi.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16229766621856.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/dofepogukikiwikadovazovu.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/20e9ce5436dde2381d479cc0fd4cef04/70652876941.pdfIn PDF document text
    • https://travelstore.tn/userfiles/file/rikijazitefakiref.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf897d3484---44746429941.pdfIn PDF document text
    • http://bouncebodysupplements.com/newerac2c/userfiles/file/pupabo.pdfIn PDF document text
    • https://aashianarealty.com/file/goreridivigexila.pdfIn PDF document text
    • https://shian-jin.com/UserFiles/files/vawebigem.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/b9463e6d9604a2909911bb37ca7a6b86/xunevirawuwawegonu.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/854og6ecaibmke3slc3ohvdmn1/fivisemuripejonazebexir.pdfIn PDF document text
    • http://kolesnikov.pro/ckfinder/userfiles/files/bugupigosuliju.pdfIn PDF document text
    • https://elitstroycraft.ru/source/file/1166869735.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/c29eb02e844437ab22c3f6d75d0a1eec/guworitakosanasako.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/rs98e05ppfj9t7j1a21e2kumo7/53293339326.pdfIn PDF document text
    • http://zuche0551.com/upload/file/vakonujelowezunoxi.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8fb400de0---zudilinolado.pdfIn PDF document text
    • http://cn-noah.com/uploadfile/file/ziduwirakenivoxaxupidimul.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b6ea1df8d---15356302769.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/f6dlc9argdj8gen415eg5f5nl4/96091469820.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/c07c98e7bfd6aca351cf6a7516c1eb16/gimatebamemowasuvovepele.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3bf18dbcda---wifelevubuvugugifezasu.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b08b2800be9---zipomolumu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=origami+frog+instructions+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

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_off0000f35e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35E 10908 bytes
SHA-256: 4d72c16d2c1535ff4b86d65af47feaad57380ebc4465e6a99b36e85e69e67a59
font_01_sfnt_off00010c77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C77 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12489 16620 bytes
SHA-256: c60aedb7330cc04f54a26a249a84c5d71f33f661f8dae2d902ccb2e703e9bb9e

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