Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e5a36307f7f3d87…

MALICIOUS

PDF

85.5 KB Created: 2021-06-27 05:01:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e2bf3a7bf8d287c6d100a273679000fb SHA-1: 85fe74c26bfcee16a51331bb4c3354b5656acf67 SHA-256: 6e5a36307f7f3d87297561f9b6541e9fe81b1253ccc96474e5fa91bd1851c934
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm designed to obscure the true destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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.
  • 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://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16081b862c3589---wefogilamisit.pdf
    • http://cosmickino.ru/sadm_files/86306129836.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160797b5c2a775---87767890645.pdf
    • http://toonesk.com/upload/putifonu.pdf
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/miginufuribuwi.pdf
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5556b183da---mukekeguripovusevirubid.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e002a6c40---dosurozazesapoxigasuraje.pdf
    • http://parvazyab.net/basefile/api203/files/jovapadulasab.pdf
    • https://nilsagame.com/calisma2/files/uploads/jigijaxovewogivuvejuni.pdf
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/daead2c0841e526c0cd4a313349dd89c/zizewofapo.pdf
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/10c330a32563ff5ae43e900ebd8903ad/gikuxuj.pdf
    • http://armanetti.com/images/89111445525.pdf
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/d5184b6c51719ebe74fc93c78c9efa4e/jofenipegejefujom.pdf
    • http://xn--80aaa1acmiejxr6d7fg.xn--p1ai/data/files/mevanekebukumusawa.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b85a7af1c4---3387643548.pdf
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/accfda7952d85b7e7de1ae63467ce28c/33043095540.pdf
    • https://edmaker.site/wp-content/plugins/super-forms/uploads/php/files/c379bd84f382435bb531d4750c8999e2/33153305125.pdf
    • http://www.bash.cl/media/file/tumusigobiguwovif.pdf
    • https://szud94.hu/img/sajatfile/files/ruvunesatovepidapekam.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160775e5588a19---redopunewepegakovij.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aff9f46661c---44161182190.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/gjoo5mqs30aobb0c7qgpc7726b/nuximaxowato.pdf
    • http://clarasonic.com/upload/file/6499982892.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6e9210c9e6---laloponevubafanes.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=general+electric+relay+manuals
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edb0.bin
3eb4bbd412a79e46bdd874c9d1685f373eb3b4997bf50dbaae4c4c527674cdb7
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB0 10524 bytes
font_01_sfnt_off000105ab.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x105AB 16792 bytes
font_02_sfnt_off00011dbd.bin
badcd4a898deb1154e9a084f4d80b62764a7fd10fb3bdd870b2f20eafa7c6ce8
pdf-font-stream PDF embedded font (sfnt) at offset 0x11DBD 16592 bytes