Malicious PDF — malware analysis report

Static analysis result for SHA-256 2980106b2022266b…

MALICIOUS

PDF

81.9 KB Created: 2021-09-03 16:53:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: da5ba07d656130d1fc927dd00b123ee7 SHA-1: 5734afe40c70aa6e151505c58dc9a64761dbf5fc SHA-256: 2980106b2022266b6152c36f6fd7b25321133770be5b3f38394a5004720a46cc
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised CMS upload directories, a common technique for hosting malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, and the document body was unreadable, but the URL structure and heuristic firings are sufficient for a high-confidence assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/60aaf1ee026462d25dd881f1e206cf3f/gisipab.pdf In PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/dfd6943a0c444f6d4aee828e00c249ae/31983702925.pdfIn PDF document text
    • http://papinchess.ru/userfiles/file/35588679266.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/3e4b45af447fb0cb9bf5e109870173ba/tutosukogalonalusejet.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d991690f63d---lujasilotusotaroxej.pdfIn PDF document text
    • http://merlegdoktor.hu/tmp/62428815527.pdfIn PDF document text
    • http://velapower.com/glwh/UploadFile/file/2021081302202873499.pdfIn PDF document text
    • http://asokmontridental.com/userfiles/file/55506980136.pdfIn PDF document text
    • http://brmxn.com/userfiles/file/20210721041329_atjgzb.pdfIn PDF document text
    • http://epoxidice.ro/mm/file/kijabu.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/5ccfc07c49a394ccd925ea4a43a17b94/kemadaxugirepifalagexo.pdfIn PDF document text
    • https://haisanquangninh.org/data/dulieu/files/46516923187.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/9gu9ra8oo6u7uv74isptfmq1l8/61844104581.pdfIn PDF document text
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/ferulimojiwebarufopebawag.pdfIn PDF document text
    • http://jkphotocon.org/data/userfiles/files/dupudutedolijikolug.pdfIn PDF document text
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/9737992814.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16074807e2ab68---93093650850.pdfIn PDF document text
    • https://bookatowncar.com/userfiles/file/luzisemasufonefekazewupi.pdfIn PDF document text
    • http://veterinariogiardinelli.it/userfiles/files/40377119732.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/cf2d40e00d9d291a145b6fba2b476ed7/8489788933.pdfIn PDF document text
    • https://bangkoksolarpower.com/syner_upload/images/files/74467601351.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/9bb540129e7ed4861c94580dcec7436c/kovubinosolesesupala.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/f14c24c65c379e282b0098cc7f2891e3/venifamifirolavaduweta.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=paleontologia+definicion+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A9 10528 bytes
SHA-256: 740502e9db25bf6bc94f0d432a49e7e1cb44fbb5a3aa982a43551b87e490b27f
font_01_sfnt_off0000f188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF188 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001099a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1099A 18484 bytes
SHA-256: f7e159aa760722d2fe7ccc1d16825e7a4347a47252a2426778fbebc40fe391c7

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