Malicious PDF — malware analysis report

Static analysis result for SHA-256 7af6c609f0c4a137…

MALICIOUS

PDF

117.5 KB Created: 2021-07-14 06:56:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 06b4c8862554caa4236b8766e1771e4f SHA-1: dafefbf11711395ee8a9582bcea7951488ae2104 SHA-256: 7af6c609f0c4a1373fc527800f266bb71d09056b7f39ae7dff6c9362cac85131
156 Risk Score

Malware Insights

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

The PDF document contains a link farm pointing to multiple domains, many of which appear to be compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The primary attack pattern involves directing users to external, potentially malicious content via embedded links.

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://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f76e0ca66---1763622298.pdf In PDF document text
    • https://haisanquangninh.org/data/dulieu/files/faluzudepemevozepuxor.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/078556527e704969427ee2c1c1f0aff6/wisagekakedegixakos.pdfIn PDF document text
    • https://keluargamimpi2.com/contents//files/25745863059.pdfIn PDF document text
    • http://ruihuitax.com/files/file/60499891072.pdfIn PDF document text
    • https://bajrahrs.com/userfiles/file/xenuvenalobiv.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/9a3749cfe4adb67d4540391aa87f4f4c/paxana.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/42502840310.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/54412124067.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/12c2a79cf9715cc433998a12a6d30c0e/javugotagatarunilubunuro.pdfIn PDF document text
    • http://diplomat2014.ru/ckfinder/userfiles/files/87792588296.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d95b273ffa---86363703593.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3c07500fa---malusulafejapopusalusax.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160764b724d3fb---bekiwezelate.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/ci7tq7pon5dqi10dfgmr30abfl/63330254929.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/bbe38af2e8976ce886bb8d3af9032e1a/zujivuj.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/nexamowenetaguwugukapaso.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16076163034a00---60899802269.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8b489bd8b---kamajosagiwa.pdfIn PDF document text
    • http://pressvaluation.net/userfiles/file/bukafekaxumawijakumi.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/0kuf6ps1s3n83t598k7g3tec42/8556335416.pdfIn PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/42861893150.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=well+intentioned+meaningPDF 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_off00016a4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A4D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001825f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1825F 17928 bytes
SHA-256: e30f4e79723eafa828bd69d436560d2a4fffce1fe03dca6344fec33cf4488d86
font_02_sfnt_off0001b088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B088 10316 bytes
SHA-256: a45cc136633a4e9b839b71f68477b74c587244f37bf706cf74c0c5d9dd053b71

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