Malicious PDF — malware analysis report

Static analysis result for SHA-256 1745cd7dacbe542a…

MALICIOUS

PDF

85.4 KB Created: 2021-09-15 21:01:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1f80d7145e2327c782e8853df3c6c514 SHA-1: 5944989ba3c95d976df9eee72c2755b9d4bb662e SHA-256: 1745cd7dacbe542addc94018afdef2868c53e6f7c6e4af4d30b060a0f2904f70
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is a common technique for executing malicious code within PDFs. The PDF also functions as a link farm, directing users to multiple external URLs, some of which are hosted on compromised WordPress sites. This suggests an attempt to lure users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://e-sportis.com/images/upload/93330076233.pdf
    • https://ilexgold.com/app/webroot/files/userfiles/files/7697755139.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133d3c2f279d---38882087511.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/a8093c7a5b9e4cb99bfebb2e9537f728/mirasutebufugawugulowutu.pdf
    • http://torby.kbo.pl/ckfinder/userfiles/files/wazagim.pdf
    • http://48bulls.com/js/upload/files/42246047262.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1612fa794d30d7---89637401854.pdf
    • http://huthamcauquanggiap.com/upload/files/96058936917.pdf
    • http://muzeumostrowiec.pl/obrazy/file/zibodetijotajum.pdf
    • http://icsbc.ru/fuploader/file/96101059637.pdf
    • http://daithanhnam.com/upload/files/tifiguguduvodavelulapeki.pdf
    • https://giverny-bkk.com/upload/files/bofalinajubusovu.pdf
    • http://adhunikjewellers.com/ckfinder/userfiles/files/runobelifapusonono.pdf
    • http://oryginalnedekoracje.pl/userfiles/file/ridufat.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a77bae3f55---89725270552.pdf
    • https://newsale.linyn.mobi/upload/ckeditor/pages/files/72377762590.pdf
    • https://mokhalasati.com/userfiles/files/48454789928.pdf
    • http://www.northern-japan.com/image/upload/File/dusurex.pdf
    • http://www.jacenter.org/js/ckfinder/userfiles/files/tegatixanijo.pdf
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/2d4f731af2645c5fbc5b49b95eeac369/zazusemanirujidabo.pdf
    • http://www.omt.ntou.edu.tw/ckfinder/userfiles/files/29151175965.pdf
    • http://whkmradio.com/userfiles/file/fukugenixexemixate.pdf
    • http://hizirferforje.com/admin/fckeditor/editor/images/file/98875831103.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613cb7d34faea---tamenixival.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=johnny+crash+game+android
    • 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_off0000ec06.bin
724749a45cbb6d5413bf8faefdb05814c0acca506d30310e4720ff5d0ee8e476
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC06 16744 bytes
font_01_sfnt_off0001173d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1173D 16792 bytes
font_02_sfnt_off00012f54.bin
b5f8cc89aeccb70a3c727bf8396c3147f57ea61ae0104aee206ca36f046c9531
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F54 10780 bytes