Malicious PDF — malware analysis report

Static analysis result for SHA-256 062ac208a72fbfc2…

MALICIOUS

PDF

76.6 KB Created: 2021-09-21 01:22:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: d6c47c80231b002099d7703323adefc6 SHA-1: 459ebc27cc9aac3612d22c42244d3cfcd48bdcc0 SHA-256: 062ac208a72fbfc2d1622d398bf01dde1893ab6f75812540ba014d288a3d95fb
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised WordPress uploads and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://cructi.ru/uplcv?utm_term=android+development+in+visual+studio+2010 PDF link annotation
    • http://didopack.com/files/29670417393.pdfIn PDF document text
    • http://autoscuolepintozzi.it/userfiles/files/fipejime.pdfIn PDF document text
    • http://rld-carbon.com/file/vafuzusuwagov.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613db4d854fb8---90137128867.pdfIn PDF document text
    • https://philly.drinkpoint.com/uploads/files/mimutitorigebukitiko.pdfIn PDF document text
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/d4c69e65148a07e273483b6e0408393e/lorilurodibelikagivev.pdfIn PDF document text
    • http://metrominicabs.com/survey/userfiles/files/97423312001.pdfIn PDF document text
    • http://mikol-styl.cz/userfiles/file/35753019557.pdfIn PDF document text
    • http://americasbestwingspa.iorderfoods.com/uploads/files/26866693989.pdfIn PDF document text
    • https://literie-depot.fr/UserFiles/file/24973772880.pdfIn PDF document text
    • https://biorenta.lt/ckfinder/userfiles/files/fedovawerukedakeg.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/a806081a0d3489bb72220d3d748a6344/37122306856.pdfIn PDF document text
    • http://modern-pro.ru/files/file/39525387938.pdfIn PDF document text
    • http://matras-devison.com/upload/file/99699754442.pdfIn PDF document text
    • http://bebsulmare.com/userfiles/files/55396624467.pdfIn PDF document text
    • http://domosplast.hu/files/file/bovibifanaruvew.pdfIn PDF document text
    • http://aktifimmo.lu/userfiles/files/pegetepefewazimesesaz.pdfIn PDF document text
    • http://sinostandards.net/upload/files/zulubonajugilat.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16145db750c688---19718547682.pdfIn PDF document text
    • http://humansharehouse.com/userData/board/file/47910224245.pdfIn PDF document text
    • http://conblocmanado.com/pics/file/87978385322.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132370a39169---58743945989.pdfIn PDF document text
    • http://www.otevrenysklep.cz/ckfinder/userfiles/files/kofigotezidim.pdfIn PDF document text
    • http://gewald.ru/content/Files/rinipudilulexeramokebog.pdfIn PDF document text
    • https://drrajanmahtani.com/userfiles/files/xulizeru.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/79230502564.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_off0000c7a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dfb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB7 16568 bytes
SHA-256: 339a0a46a57476452c942d5422bbe7feb15b26c39c4df899e64848418e33c384
font_02_sfnt_off00010a65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A65 10996 bytes
SHA-256: e9316626b6f2fd06902b662cec31aa0bee6abf645bc8e9728ff449d2eea6330f

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