Malicious PDF — malware analysis report

Static analysis result for SHA-256 02aaf30aeed01623…

MALICIOUS

PDF

92.6 KB Created: 2021-06-30 05:54:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f21a106c432234a4792b92da6b0dff2f SHA-1: 19b2392a1e4a52a0111069531fb955e50c803492 SHA-256: 02aaf30aeed01623e6a6d5887d6d7dacc72089f1d362c7e4bcfc6adb65a74546
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised WordPress sites, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or exploit kits. No scripts were extracted, but the structure and URL patterns are indicative of a link farm used for distributing malware or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/d6jepcu3k57dtiq1gcbru2jdcv/86406565223.pdf In PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160785745e7f68---jogexegavaw.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/a0924b49233cf7b6446dc75659491a0f/62249217452.pdfIn PDF document text
    • http://coming-c.com/userfiles/file/jisokujidolusefu.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081cf14ef76f---55149820288.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/ftaso3rimtuh78a004je15ghe5/bodiwidorelo.pdfIn PDF document text
    • https://aksukartela.com/images_upload/files/vudugegibizixoba.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/jipevejorotajirowekem.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/6th6ug55lsn4phgtegt1qls1q4/raxonivej.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbf936a171---99855849449.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/00681ec6e4c44ffca31673b565b06c76/foruzunetanin.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/746uvcrdk3kf1sek9kg0f7gjk6/firewebidovonetilut.pdfIn PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/kefobe.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/gik2svu5hpn4f1mlqn2eheri75/51289812389.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/8d6a3316abfc1139e9f7e835e1f6dfbe/77862506388.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/538e1abb39ae8749b3313e15782b493a/logiwukifusotibusosex.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/60c0c65a1f654d788a1a5e678ee47a3c/mebogifexim.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c29e60314f2---96510542307.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d443bfb0883---revodonakofujomaluw.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/6grgoaf8h1ut8idi52pu9n47h0/6486908051.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/2f98df72997a91193107f3eba756b181/xebam.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/rafedit.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/36098684805.pdfIn PDF document text
    • http://93564497.com/userfiles/zoziliresufibo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=minuet+and+trioPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105CD 19036 bytes
SHA-256: 8f2ec14d58deb6c8c0dad7421cedefeaa9ca5c05e8186f16bdbcfde3a5111654
font_01_sfnt_off000136c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136C8 10120 bytes
SHA-256: c46ca43e69fe282b6817734e8288e2ea6ec648c9b88caec195077dec5023c21b
font_02_sfnt_off00014d76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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