Malicious PDF — malware analysis report

Static analysis result for SHA-256 b229fedc17d7bf36…

MALICIOUS

PDF

70.9 KB Created: 2021-09-02 05:49:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 68e51c0241f602116c0211052f53f5f5 SHA-1: 906c99f9f78369cf12931f02b40c77ebe154636d SHA-256: b229fedc17d7bf36f9c8d91c6e915dfddf8b95dd560669f4c8275d16ab299bfc
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm. These links are likely intended to redirect users to phishing sites or download further malicious content.

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 https://infrive.ru/uplcv?utm_term=out+damned+spot+meaning PDF link annotation
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/jm4ujujfl27u2j48a1ffkvihje/93557017556.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec553cf897---piziradagodabub.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/47eb3d8f8ee1b95ce98df331190b50e9/45247266733.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a904d6031---duwozabasa.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/301d363cfd63d0f025d0fc59eb5bc950/97021372148.pdfIn PDF document text
    • http://metabolizmusonline.hu/images/upload/file/fopaxeximesanutegov.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/9b96a5937d9df02c5e0b83e64204c288/mijosobujuzetusojepomixe.pdfIn PDF document text
    • https://sce.tw/uploads/files/60b626ec05f9b.pdfIn PDF document text
    • http://chemsdano.com/upload/files/gadamefufel.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/d083a0bfd410bcbf64c1ca64c7d5452e/53568186079.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/34874001252.pdfIn PDF document text
    • https://vicotelecom.vn/static/source/images/file/zerej.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160844f1c78279---vezudum.pdfIn PDF document text
    • https://yesilkoyluleriz.biz/resimler/files/60535583301.pdfIn PDF document text
    • https://www.tahitotfalu.hu/ckfinder/userfiles/files/50576231145.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/zunijixalofadipepilowebet.pdfIn PDF document text
    • http://clairerolo.com/userfiles/file/73548296822.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/72531164788.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d8acaefe4---lufuletujaguzapos.pdfIn PDF document text
    • https://sensiblemachines.com/ckfinder/core/connector/php/files/lalunafapagoriniruwi.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/3e23fe27ddea7e52bf9803c30555a8c6/boregexugabizoniwu.pdfIn PDF document text
    • http://poetische-malerei.de/web/editor/files/zepezapakesowodevuzux.pdfIn PDF document text
    • http://nepalbestcargo.com/userfiles/file/dimuxomibomikezulep.pdfIn PDF document text
    • 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_off0000b59d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB59D 10712 bytes
SHA-256: cb07cb32925a63e1cb89a6e9610e94c1d452453acc80c8083f3bbcc28076879e
font_01_sfnt_off0000ce05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE617 15892 bytes
SHA-256: 6c51dba7e92ed67e4706724e4f55415df65bd4b72a3b4f2c2996b82ee8ef19fe

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