Malicious PDF — malware analysis report

Static analysis result for SHA-256 706e230ff026450a…

MALICIOUS

PDF

83.4 KB Created: 2021-09-18 09:11:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 110eebdb266b9f46f7462e14d1f607dc SHA-1: 0d598dd4aa5f783d05ae459dee09d6def0d4acef SHA-256: 706e230ff026450afce0161be10034d733da60a2d959d74c71990e632ccf5807
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and an ML classifier, and it contains embedded JavaScript. It also features numerous external URIs, including links to compromised CMS uploads and link farms on disposable hosting, suggesting a phishing or malware distribution attempt. The presence of JavaScript indicates an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pixomot.ru/uplcv?utm_term=police+and+criminal+evidence+act+pdf PDF link annotation
    • http://www.grifin.sk/files/jovoxiwiwiledazex.pdfIn PDF document text
    • http://debschoen.com/userfiles/file/34701438541.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613b910a766ca---kiwuxelakidesugumelasoz.pdfIn PDF document text
    • http://traktorpulling.de/ablage/userfiles/files/xaxubajilamew.pdfIn PDF document text
    • http://travellerisland.com/files/ponev.pdfIn PDF document text
    • http://trevelsi.ru/ckfinder/userfiles/files/kakogesekut.pdfIn PDF document text
    • http://www.creativitaecomunicazione.it/js/lib/ckfinder/userfiles/files/55814910559.pdfIn PDF document text
    • http://cariboohose.com/userfiles/file/povisumifireju.pdfIn PDF document text
    • https://vas-vill.hu/userfiles/file/mutunujoradakuv.pdfIn PDF document text
    • http://ambcavallon.eu/userfiles/files/pozixepobumuvazoso.pdfIn PDF document text
    • https://maria-galland.ru/files/file/sisovavumagumipinaxoralu.pdfIn PDF document text
    • http://www.gc-antey.ru/ckfinder/userfiles/files/xukoloteserazalurozif.pdfIn PDF document text
    • http://szwygs.com/upload/88498604896.pdfIn PDF document text
    • http://enjoybowlramenandpoke.com/uploads/files/46323589345.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/16134c5d9ae9de---45202093263.pdfIn PDF document text
    • http://leguido.net/files/65641247269.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1613f58781067d---zezevonopezafivegefupeni.pdfIn PDF document text
    • http://harekatmemuru.com/images/Media/files/tukevopikopuxakazuparu.pdfIn PDF document text
    • http://tbeaindia.com/userfiles/file/zobozuxaruwogefemaw.pdfIn PDF document text
    • http://studioagronomoserragiotto.eu/userfiles/files/bibododok.pdfIn PDF document text
    • https://nezrenpin.com/calisma2/files/uploads/lakupuxetosijisekagovip.pdfIn PDF document text
    • https://beldapin.com/calisma2/files/uploads/58036726379.pdfIn PDF document text
    • https://doanandieuduong295doson.vn/namthuan/images/news/files/4838118722.pdfIn PDF document text
    • http://elcwma.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fedileme.pdfIn PDF document text
    • http://highdeal.linkeo.net/ckfinder/userfiles/files/5636178048.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_off0000e189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE189 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A0 10680 bytes
SHA-256: fa608d91529a7b75e81bb5703d24c7aa2143f2ed28ca6bf7fb7c8fd055cae722
font_02_sfnt_off00011212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11212 17488 bytes
SHA-256: ffd00e146beca7c0343fc4f09399bae6a6b68754fe4daea0982f2e35e5d84478

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