Malicious PDF — malware analysis report

Static analysis result for SHA-256 a15e828f5ffe164f…

MALICIOUS

PDF

69.7 KB Created: 2021-09-26 12:26:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 71ee38ff61fd6b37b89cfe28a25b444c SHA-1: b2033c0c0e6b314bdb8679b3926635be8897bbb5 SHA-256: a15e828f5ffe164f878cade790b3802f664a0bc9950bd5e92102a380740b0f6f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised websites or 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. Although no scripts were explicitly extracted, the PDF structure and heuristics point towards it being used as a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://garglob.ru/uplcv?utm_term=flat+3d+icon+pack+apk PDF link annotation
    • http://studiotecnicoprato.eu/userfiles/files/72830345653.pdfIn PDF document text
    • http://whatcanidoforyou.eu/publish/file/voxefuket.pdfIn PDF document text
    • http://xn--2-140-swe8h.xn--p1ai/files/wikojaxemadasafuvisapo.pdfIn PDF document text
    • https://amigo-shop.105h.net/upload/files/51271664533.pdfIn PDF document text
    • https://stealthwindow.tw/uploads/files/202109070352363041.pdfIn PDF document text
    • http://bhhangkhong.com/upload/images/files/nisepipasiwabenusolibaja.pdfIn PDF document text
    • https://nikoljski.com/ckfinder/userfiles/files/lowuxofediguviku.pdfIn PDF document text
    • http://pascalparrot.com/uploads/assets/file/kezezunex.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/xexuzutedufaxu.pdfIn PDF document text
    • http://facilitymanagementassociates.com/survey/userfiles/files/zovorogopewazini.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d2fff30c65---54762071881.pdfIn PDF document text
    • http://tokyosushilohaus.com/uploads/files/51347978258.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/161446f3240040---linokulelexos.pdfIn PDF document text
    • http://art-wonders.com/ckeditor/ckfinder/core/connector/php/uploads/files/dadavatijaforiruxuvivadeg.pdfIn PDF document text
    • http://olimpic.hu/ckfinder/userfiles/files/kuxajizuxi.pdfIn PDF document text
    • https://fibaquitaine.fr/cebatrama/userfiles/files/51698025606.pdfIn PDF document text
    • http://elazentrale.de/images/uploaded/file/tipinuvuj.pdfIn PDF document text
    • http://hopkim.vn/upload/files/fowezegowavatoxofepibop.pdfIn PDF document text
    • http://zetrade.cz/userfiles/file/sadegalavinokujexupefutow.pdfIn PDF document text
    • https://bruceautoservice.com/files/file/21708467219.pdfIn PDF document text
    • http://ddaengshop.com/ckupload/files/25993317131.pdfIn PDF document text
    • https://accu-split.com/userfiles/files/60219417909.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1614c42680d777---xuzukonafesejepum.pdfIn PDF document text
    • http://nhatrangpalacehotel.com/app/webroot/upload/files/ginizulix.pdfIn PDF document text
    • http://contactfm.be/userfiles/files/26024359792.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145afaae047c---dobanabebopivatorifire.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_off0000b4f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD03 14556 bytes
SHA-256: 524a44f4b8819d78332ef3e5cae9fa8a4ee829adc07c37658ffe90cb020fe28a
font_02_sfnt_off0000f160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF160 10348 bytes
SHA-256: 307e77dcd01f83ed82e932eab9b504ccf2a0e73d55fddf05a32868d38f6e7a75

Open this report in the interactive analyzer, or submit your own file for analysis.