Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eb286230b941b42…

MALICIOUS

PDF

113.8 KB Created: 2021-06-28 10:23:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 85bf5f456eee7e1743f395a2f9ff45e1 SHA-1: 61a19eb78e96d78f17ca52b6b36bc3ae2bad595c SHA-256: 7eb286230b941b42b46c43979c30e3262528c8025aa0c8977729c280c3254db1
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains a link farm pointing to multiple compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of numerous external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicate a likely phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://rkdestate.com/userfiles/file/22131084344.pdf In PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/aa0e94ff091138e790b8334402361b43/66008828828.pdfIn PDF document text
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b47957990---52741613286.pdfIn PDF document text
    • http://esipro.lu/userfiles/file/21572034188.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/27225083444.pdfIn PDF document text
    • http://bjallstar.com/upload/file/61251467544.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1607fbc93849e0---pinato.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/e7b1a890d361c37aa8ef94eb51ee394c/kemasafuxuvi.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/g77gnac9tusi13q58a70pn5ot2/liwuwabapirazawopabilo.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/d4tvt7bs7on7eumqbssbk2b924/86631046846.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc8762d5df---96267725818.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/37ftjt6ijs2dkesidadn3d4svc/jexijodolobalunenaz.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160716a4f81f80---67716920969.pdfIn PDF document text
    • http://notariocprietoa.com/notaria/documentos/files/dagovemexopekutis.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/puvet.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3dd85d1b68---vexewaf.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/tdfn06iej8i9m291tldjpltm66/91461787736.pdfIn PDF document text
    • http://changwontour.kr/FileData/ckfinder/files/20210616_8389264086031929.pdfIn PDF document text
    • http://antonio-pelella.eu/userfiles/files/jomekonuba.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/37132i37ra5qasee4t9kudlcuq/mozaxuvipolabizoxerupi.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/6fddd7b7779f7bd0061091708e00e5d7/solimojinedogirufeje.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd7f44b9fe7---xebesadirema.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/fedez.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/18169963835.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607dba91a00fb---68789997230.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=best+proverbs+for+youthPDF 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_off00015cfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CFA 10524 bytes
SHA-256: 9ca084bb2dd3aa2424d17e99f7e38d193bc8d3dbd4d5314ce4a17f2af14ff11d
font_01_sfnt_off000174ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174ED 17412 bytes
SHA-256: 22fc3f69fcd6c57c89d0e00e640e7643c560ebfefc87404489255b32c5dec599
font_02_sfnt_off0001a1c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A1C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1