Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e5426a798d264e7…

MALICIOUS

PDF

101.4 KB Created: 2021-09-05 22:49:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c8d489e91009e310c613d99ab94b1180 SHA-1: 5269ee85b24d26a39cc98aeb0df69b33c3809a9f SHA-256: 3e5426a798d264e7c5cfdf489a55a383f09e61e2e622ddea510ac8f4f4880de1
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to various URLs, some hosted on potentially compromised CMS platforms or disposable domains, suggesting a lure to download further content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to evade initial gateway scanning. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://clear-es.net/yamituki-n/uploads/files/jatug.pdf In PDF document text
    • https://ppntassone.it/dati/upload/file/15779946407.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/c881654678963a9f46b6cdb7dce31ff5/vizujejobikulifuwoninev.pdfIn PDF document text
    • http://www.larucheapain.fr/ljk/file/xajuxesuvasonenotutezaku.pdfIn PDF document text
    • http://abwalabamaave.com/uploads/files/19858473809.pdfIn PDF document text
    • http://gzcil.com/uploadfile/files/91673538427.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/16116e23e1c4ea---23790937048.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16070363d6686a---repivuvifuj.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/bmjjniffb79c7r8t9ho249hqoi/libulisuvenot.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1612672e96cf9b---63143645135.pdfIn PDF document text
    • https://vegas-shop.net/uploads/files/vafunetadasu.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/c275e291f24550f424fa9a277b6635cd/49623558908.pdfIn PDF document text
    • http://cityclick.it/userfiles/files/94956403503.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1611466ddc9b8d---jisikemutogakevag.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160935efb1c97f---jaketaxetonuniropar.pdfIn PDF document text
    • http://musiconthebay.org/clients/2/26/269dd5bc96e197da989a8dccc71442af/File/xexolife.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094cc2f30c2c---6397743888.pdfIn PDF document text
    • https://kocgrafikavukatwebsitesi.demowebsiteleri.com/upload/files/80863659729.pdfIn PDF document text
    • https://mnlex.it/file/55541992037.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/dcd5c9a259557890f28019200930d20e/wadal.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/45877647285.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210605224728191.pdfIn PDF document text
    • https://granitabrasive.hu/editor_up/jevexibavuxexaf.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/d64b7665e9035adfeebb7cdf90025547/92176473423.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=convertisseur+pdf+to+word+gratuit+fran%C3%A7aisPDF 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_off000120cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120CB 11108 bytes
SHA-256: 5fba7e5291aa44ef0efacda30f170356da533700f93d2102b2ea44149f249766
font_01_sfnt_off00013abe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ABE 20080 bytes
SHA-256: f2784aa25a7f33f4b945e95860e142eaa2da7639dee64b8aeba2f5ecd6221ca9
font_02_sfnt_off00016d91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D91 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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