Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a82ccb7eb500315…

MALICIOUS

PDF

82.6 KB Created: 2021-06-25 23:16:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5550f378b74e7489483433b00e385702 SHA-1: 056142bea1422ade0fcebe2134e0951341fd373e SHA-256: 9a82ccb7eb500315935c192e6e589ce1cc15f06ff9af9a90f4cc3d6cfa1f49d9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No specific family could be identified.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://africareview.in/userfiles/file/37551781539.pdf
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/c6cb8c7bf4d96b69af4785dac0b20de8/36957648412.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160851e3a7f3dc---25200552241.pdf
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/5e626dd3d36900caab511eb3f0e0077f/bajirifakodam.pdf
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160bae5811104c---36028670440.pdf
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/89192517937.pdf
    • http://zulassung4you.de/bilder/file/50525224629.pdf
    • http://gomientrung.vn/uploads/image/files/nijonak.pdf
    • http://uleshuzatshop.hu/files/file/puwawukaji.pdf
    • http://akiyastyle.com/app/webroot/js/ckfinder/userfiles/files/77057749382.pdf
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/e0f22a98d1c2585bdaf2297e3345255b/68204983274.pdf
    • https://kraftyz.in/ckfinder/userfiles/files/90133057487.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/be5fba1b930569b944b9a84dfeb30d09/pabavafejuwigasegebivotil.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2788603ef---lekadoguwanejimekokaf.pdf
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/m9htojebu92hs1kj0mh46bomr6/solofuwimivepevevuzixejo.pdf
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/9a171055f4aff7af7eb86469f02d2d2a/35995419723.pdf
    • http://chixue.com/uploadfile/file/20210601014354.pdf
    • http://bouncebodysupplements.com/newerac2c/userfiles/file/wagubib.pdf
    • http://grawerlik.pl/userfiles/file/99245922873.pdf
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/f69e087b7f6b2370bcffd353b40a6cad/88466377384.pdf
    • http://rkmaster.ru/uploads/files/bikekukas.pdf
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/f1cb659079932662dacf52ee7960448a/86248292175.pdf
    • http://adams-gold.ru/archive/image/file/27018680170.pdf
    • https://koratspring.com/upload/file/4313602111.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160b1fe65c8690---rovilonojamezujalin.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=bos+to+grr
    • 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_off0000e27d.bin
60fc37e01f4bf3ca68026d952ad497a4d4e907e24c94d701f0444f9ffdbdf098
pdf-font-stream PDF embedded font (sfnt) at offset 0xE27D 17260 bytes
font_01_sfnt_off00010fc3.bin
49d597ad91b6afa6b7df980beeeff98c09299f2d0fb8039e6611fbea7fbd608a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC3 9800 bytes
font_02_sfnt_off00012560.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12560 16792 bytes