Malicious PDF — malware analysis report

Static analysis result for SHA-256 183ee9c7f184957d…

MALICIOUS

PDF

107.6 KB Created: 2021-07-15 22:27:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: be992d667066aa606f63041a3b2d0a76 SHA-1: 0170de2dafab70bfb070fecf2d98d0589db55378 SHA-256: 183ee9c7f184957d58603ae02dc4900475c091e22dfb8e133c826c693533fa55
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to direct users to malicious or phishing content, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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=red+and+white+spaniel PDF link annotation
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/575284c60989664d6fba1b3c25ed2c6e/mugekiwuli.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/97816464801.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b1d44ec9079---bidudamewopexadodox.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/f913b6b17153e15214bb64d90e0c1495/2548805268.pdfIn PDF document text
    • http://chongthamnguoc.vn/img/files/60641066424.pdfIn PDF document text
    • http://lbhs1965.com/clients/6/6b/6bdd8f708684a1f547efbf97e1630fe5/File/58421422951.pdfIn PDF document text
    • http://whs1979.net/clients/65916/File/77965830157.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609320f0a58d5---votip.pdfIn PDF document text
    • https://fcr-fomentoconsumoerenda.com/uploads/files/61474073037.pdfIn PDF document text
    • https://propactionvehiclesuk.tv/userfiles/files/68647643788.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/fc9c7a7cb5a22f506d5523551ded7348/dalasivunapatob.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e15994efa6---55226914093.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/77e383addb83adbc0f511debb78a852b/torigebu.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/kni74phqotn3ihdtg3v8mo00r8/16214569796.pdfIn PDF document text
    • http://amongelite.com/ci/userfiles/files/1822097042.pdfIn PDF document text
    • http://doubletroubels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad8a9b113d---73367458567.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad9fd41e45---xunotefizot.pdfIn PDF document text
    • https://tiemhoahaibara.com/data/dulieu/files/tidewete.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160be007d5c720---67425828506.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/3196f743615b0df39d07a364bd0571e1/nekegakivovuta.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_off000145ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145FF 10400 bytes
SHA-256: 9e492d3d9bdb0d086051af6b3f3bdea00743c77c362e13274a782c1bcc277581
font_01_sfnt_off00015d84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17596 17376 bytes
SHA-256: d714bdf74930bd199c46f44e3c4ca024801bcffdc5d9bfa21dbda62b785500b5

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