Malicious PDF — malware analysis report

Static analysis result for SHA-256 60ed0cb8ea51747c…

MALICIOUS

PDF

70.8 KB Created: 2021-10-02 22:22:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 60d7adf1cd4bc59050aebc0b299aa617 SHA-1: 32a3e778cb6edf8fc16e2e0ad63bed7c00bd0356 SHA-256: 60ed0cb8ea51747c6b154e8cdc9f6f6d78602739e756ac83ac023a652ee727a5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The PDF structure and embedded content are consistent with malware distribution, likely serving as a dropper or redirector to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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=modals+can+and+may PDF link annotation
    • http://greenhere.cn/upload/ckimg/files/202110022119031884.pdfIn PDF document text
    • http://kaizenlife.com/ckfinder/userfiles/files/21938821778.pdfIn PDF document text
    • https://dampinggame.com/calisma2/files/uploads/22661444073.pdfIn PDF document text
    • http://dj-venci.com/uploads/pages/files/nonusedexav.pdfIn PDF document text
    • http://mebel-moscow.com/content/xuploadimages/file/xujuperu.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc0f5492a6---kokonelixepururizuno.pdfIn PDF document text
    • https://mkontakt.pl/dat/file/lonadavusipidoritenej.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/tudulo.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/bexufeposikipikuda.pdfIn PDF document text
    • http://wordtmann.beckbauer.eu/ckfinder/userfiles/files/48974665890.pdfIn PDF document text
    • http://aygroupmuh.com/image/files/lorejugimoloxagozi.pdfIn PDF document text
    • https://gujaratisamajparis.org/upload/files/12084646715.pdfIn PDF document text
    • http://shouquan.scarclinic-cn.com/uploadfile/file///98652321566.pdfIn PDF document text
    • https://gkia.org/kingkong/userfiles/files/wuzewujokabade.pdfIn PDF document text
    • http://hiredriver.com/uploads/assets/files/rikuzovimuwojojasomat.pdfIn PDF document text
    • http://theheavent.com/userfiles/files/wemolagipinedofegez.pdfIn PDF document text
    • http://cgemfoco.com.br/ckfinder/userfiles/files/sesepuves.pdfIn PDF document text
    • http://ammk.sk/userfiles/file/kotitob.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/161370d8492487---naxezerutulikirized.pdfIn PDF document text
    • http://customize.fr/fckeditor/editor/filemanager/connectors/php/img/Editor/file/xutipoforexa.pdfIn PDF document text
    • http://gianenricofabro.com/userfiles/files/73870763859.pdfIn PDF document text
    • http://fotografieindex.nl/images/uploads/nilifosi.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161540411cb13c---rawip.pdfIn PDF document text
    • http://topflexsports.com/uploads/56669049373.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_off0000b274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB274 10216 bytes
SHA-256: 904ed22113f73078374cbdf9137fbf85e94b096504c029e2131a23884186ebf1
font_01_sfnt_off0000c95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC95A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e16c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16C 17664 bytes
SHA-256: 03dabf953e7e2278529d48ebf5b69d43f243d1653e277aa30a5785725b4b9e36