Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f594c2c3c6174d3…

MALICIOUS

PDF

68.8 KB Created: 2021-10-11 02:05:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 74f89d04677f307f7839630524c9e075 SHA-1: f5568a61d35b9c8b63ba68c0536b6c825ecbc4f5 SHA-256: 2f594c2c3c6174d3fb593543f938558ff7660535c63ee336b69411be3537b568
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to various domains, many of which are hosted on compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://drafthe.ru/uplcv?utm_term=get+div+by+id PDF link annotation
    • https://owop.challengersports.com/userfiles/files/95583386020.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614a2f0cc07c9---15421436062.pdfIn PDF document text
    • https://maxflowfans.com/userfiles/file/nasozu.pdfIn PDF document text
    • http://medica-eg.com/userfiles/file/befubipafu.pdfIn PDF document text
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/923432667.pdfIn PDF document text
    • http://masan315.net/board/imagefile/file/kezosaderidogafiw.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/949e16ad687d70788e71db7c15e88e7c/93289004396.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/161515e91452ff---25050010263.pdfIn PDF document text
    • https://colegiumaniucarei.ro/ckfinder/userfiles/files/9340271620.pdfIn PDF document text
    • http://seoulmenu.com/uploads/files/28356534955.pdfIn PDF document text
    • http://neurooperations.com/ckfinder/userfiles/files/10587731505.pdfIn PDF document text
    • https://maggies-handmade.com/UserFiles/files/xetovobumizavineruk.pdfIn PDF document text
    • http://bamboomfi.com/htdocs/cljr/data/files/metijavutakesokinizenufa.pdfIn PDF document text
    • http://www.tlo.ntou.edu.tw/ckfinder/userfiles/files/duxiradudaxipexobuvilif.pdfIn PDF document text
    • http://mcenterdk.ru/fck_editor_files/files/96342697744.pdfIn PDF document text
    • http://scsychem.com/upload/files/dunule.pdfIn PDF document text
    • http://dymenahealthcare.com/upload/fckeditor/file/valaruwalevijut.pdfIn PDF document text
    • https://chptravel.ir/data/file/84191466989.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/161454d1eae978---bakat.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614037cfd1512---59691180378.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/f5497dcf111f4c0fdbaec11c9e3a34b7/55387702244.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614ca6c3ea442---jixok.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/161416f133073e---96457848005.pdfIn PDF document text
    • http://fapannimario.it/userfiles/files/zedubased.pdfIn PDF document text
    • http://www.fashiongale.ro/userfiles/files/54551207993.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_off0000b188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB188 9900 bytes
SHA-256: 8e220d0a09b130f5a87fd8320f058d25745e197fa867db6720dcd250f7f29e74
font_01_sfnt_off0000c781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC781 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000df93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF93 15224 bytes
SHA-256: a065ea4c56655a02d44017e74d8d39131b1aa2588b04005db77e833517261d1a

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