Malicious PDF — malware analysis report

Static analysis result for SHA-256 03cce2a9eb54884d…

MALICIOUS

PDF

85.6 KB Created: 2021-06-26 08:55:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f49732266c7d75e39c7d359e9079838b SHA-1: d76a20563e3173101e679675ef91bf57e347976f SHA-256: 03cce2a9eb54884dc20b3b2ea728229b20b6ae5d732fdbde7e10affd46c7cd52
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by ML classifiers and ClamAV as malicious. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories and disposable hosting. These links likely lead to further malicious documents or phishing pages, indicating a multi-stage attack. No scripts were extracted, but the structure strongly suggests a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://cs-golfclub.com/ckupload/files/50013989508.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/1b2a299853306eb236b46c926e53e84a/wefilexiwipesa.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/aa39efa79f492c6057e10d03be6301df/23430909441.pdf
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/s56tkb9fp524d7oidi3rd75t34/9802506012.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf384e0699d---66691379644.pdf
    • http://bigband-ulm.de/userfiles/files/23422348014.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088294858b17---lorodazutofoluviwe.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b89012fce---jafunanekegipepuzenaz.pdf
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076865423367---36196941979.pdf
    • https://leosservices.com/userfiles/file/50626712141.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be9e541bd62---72689167567.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16077538f30a32---wakoxolebiduzorudexuwan.pdf
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076cab5ddec5---66187135464.pdf
    • https://reitinguok.lt/userfiles/file/tujodawofatabuwowurol.pdf
    • http://iccj.jp/images/uploads/fckeditor/file/5383720398.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160858e6167a61---54901642333.pdf
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/jvrgjqembbsce5rv6r4997jmsj/zaxazaso.pdf
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/688729facd2352f7c79156b91452a006/92133735329.pdf
    • http://www.pattyn360.com/upload/forum/files/76456217257.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16083b9b6ec179---rokafudezovarovago.pdf
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160868d2c7e768---75843368284.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160703a65a9fa0---vefoniz.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=may+god+guide+your+steps+quotes
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/6efd6e5c47c83a1ea748cadd564c4f35/zupekoxodatupigujuloxo.pdf
    • 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_off0000ed72.bin
f2e015103a1e3fe4259f621e8336f4251fc1cb9dd7072200bda39d09ff0d1eff
pdf-font-stream PDF embedded font (sfnt) at offset 0xED72 10772 bytes
font_01_sfnt_off000105e2.bin
7348c9792c8abc1700f1efc14e7dbe4180d8b151b05f01617bb2ffcc69c72d0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x105E2 16764 bytes
font_02_sfnt_off0001310b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1310B 16792 bytes