Malicious PDF — malware analysis report

Static analysis result for SHA-256 58437cd122a9b95e…

MALICIOUS

PDF

90.4 KB Created: 2021-06-29 03:11:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3ba7e6d1a9548d9dbd6e3e0648621e98 SHA-1: 4876d69d9b3c902a43f8bea7ab709859cf9c013e SHA-256: 58437cd122a9b95e2693671a8e0f46724e4317a18f9f53dc946c9cf61b4cd885
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm with numerous URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to obscure the final malicious destination. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://jshtextile.com/UserFiles/file///kekipifalomobibu.pdf
    • http://banlinhkienlaptop.com/userfiles/file/73160092235.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce556bc481---69305937158.pdf
    • http://amblesidewindermere.ca/fckuploads/images/file/77005132312.pdf
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1510a914ea---zabak.pdf
    • https://aimhc.com/userfiles/file/guxopagepazovajipojewesup.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093e239e05cd---58521776092.pdf
    • https://hse.tw/upload/file/poluvemipigobe.pdf
    • https://cafeau1ait.xyz/js/ckfinder/userfiles/files/gebid.pdf
    • http://geteffective.biz/uploadfiles/file/98790051759.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa8067d8f2---76009340129.pdf
    • http://yjsyrj.com/userfiles/file/68152710514.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16089521548a58---tunukajofomebevorijunisef.pdf
    • http://alarmy-kamery24.pl/userfiles/file/pidawaxilifipu.pdf
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/d86508bb2b220930c99661ec3fecb2fe/8363751360.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a08e6e493d6---zabesejenip.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c68accc201e---kunaxuxoreb.pdf
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/305b71371f45665d52061c087866b560/22128672362.pdf
    • http://kaupa.cz/userfiles/file/923598064.pdf
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/b1be9b79c4f67b77a34ec2c95de87aae/mokojuzeranexadejeveven.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/5289eefc5a526b1c162f1f5977ff432a/gufuj.pdf
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/00acc8a8801c893820b7096183ac987b/71724832284.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099b922c0526---gevazis.pdf
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/jnkifkqkl3gg04b9rti6fiskug/gewubanuno.pdf
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/e26dbe46c46e3bafa80cb51e86df9ecd/83804118686.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/16093a8cc440c5---dijatikizopevopexufomawi.pdf
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/e9ee5047bfb34e6e6e4190d486fb33d0/15197224740.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=easy+chicken+cutlets+in+oven
    • 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_off0000fddf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDF 16792 bytes
font_01_sfnt_off000115f1.bin
652ae6072c392e34f987ce6284333018ee66bf1db0faba1e395f2f84105d976b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115F1 17904 bytes
font_02_sfnt_off00014421.bin
1187aa54df51b718835ebd9ac2c0154b7bf2dc9a3aa4dcdbe09ef12ae88c6f27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14421 10580 bytes

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