Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ec6180ba9788100…

MALICIOUS

PDF

87.3 KB Created: 2021-09-03 07:00:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: acc2b33c410f12c16722c9551ab6fe75 SHA-1: dc262d5b23aac8ab26d5f4a53d115c87d33995df SHA-256: 3ec6180ba9788100616a4b19f32ce75e005e3a4fe9c5f354e8d6069d79a133c7
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs and is structured as a link farm, with many links pointing to potentially compromised WordPress upload storage or disposable hosting. The primary function appears to be directing users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://inwebjor.ru/uplcv?utm_term=viktor+e.+frankl+libros+pdf PDF link annotation
    • http://bushurov.ru/images/files/70288346504.pdfIn PDF document text
    • http://satbietthu.com/luutru/files/31600194.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd9bf3b22e---kifeteram.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088009079bee---79511813396.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16096f6bccd710---sepediso.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/58867400394.pdfIn PDF document text
    • http://khocabien.com/uploads/files/benajolitomafo.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/48805af6d3a37f687c17fd862a9113f4/64781675975.pdfIn PDF document text
    • http://kaies.cn/upfiles/file/zonarilezerenox.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c2dc13adb93---13834062724.pdfIn PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/nupejemomanegejusokijewe.pdfIn PDF document text
    • http://5percent-design-action.com/upload/users/files/19060327584.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/sedubu.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e7761d7e3f4---28978074767.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/riranilula.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/37034612891.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/2e8dugl39fhdcv75jpag3sj81o/mikezilezafazebitodawowof.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1610144ae61f08---75163369875.pdfIn PDF document text
    • http://izdo.org/img/userfiles/files/24901143759.pdfIn PDF document text
    • http://wolfroccatiassociati.it/userfiles/files/wefilubuduwilo.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/tatevigudi.pdfIn PDF document text
    • https://laetitiabernard.fr/images/file/74225655537.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab3cbec9f4---kufajofisozedumopepax.pdfIn PDF document text
    • https://papiratisk.cz/soubory/nanoloxozitatozuvo.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/fdff1ba799fd51bfa26db57f8a3edda6/modiretidetidagesadunuvi.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e94b2673fc4---gasusame.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_off0000edec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEC 19288 bytes
SHA-256: 94b1b4b59116fd689c8d2cf48b22d51a026bfba056e360358e0777f0840ba64b
font_01_sfnt_off00011ed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED9 10760 bytes
SHA-256: 73a355de4b244eeed10ce18bb2e98339605d5ec9e15934045e63b629c8500971
font_02_sfnt_off0001377b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1377B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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