Malicious PDF — malware analysis report

Static analysis result for SHA-256 94626642c253afa9…

MALICIOUS

PDF

112.3 KB Created: 2021-07-18 13:11:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: e7273ead099382736bedcdb8176b505b SHA-1: 30567314607c08206f846efe5cddf5275c5c5c0f SHA-256: 94626642c253afa9a6037c6eebca8a007a3a352fba979d09f97e3fe64121fa3b
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 links pointing to compromised websites, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links are consistent with techniques used to redirect users to malicious content.

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://www.temsilcifirsatlari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a9740dd24---juvetafodibifezajose.pdf In PDF document text
    • http://grupopiscis.com/upload/files/dunogolije.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160927d1a236a7---kekajanafisixisoja.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/49615219309.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5929dafa1d---dinel.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094b82537bb9---4129713055.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/53002945595.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/ba319ee2c3c07238076f2396d53c746a/67617156124.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/4e7db9960b4290038c34a77b24d32570/vazuzodafapotinisi.pdfIn PDF document text
    • http://volkshilfe-vlbg.at/images/content/files/13553299319.pdfIn PDF document text
    • http://falconfam.com/ckfinder/userfiles/files/zuxilolozu.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/94210258187.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/wuwozetunezovaruwokilin.pdfIn PDF document text
    • http://kup-vino.cz/web/ckfinder/userfiles/files/tavawagowepesesuvofexi.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/20215191617365693.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c3d2eb97b1e---jojotobolozaja.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a100c275a13---40035640097.pdfIn PDF document text
    • http://twxcd.com/img-aim/files/jepoxeti.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4b9091a863---xoxowuzekaxegupij.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c99e20731f2---xulisonamaxiweja.pdfIn PDF document text
    • http://ayurveda-shiatsu-qigong-nice.com/upload/files/bomavelibo.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/392f847210a442d1671b5b3bb76df1a2/98067454363.pdfIn PDF document text
    • http://aotwresort.info/ckfinder/userfiles/files/xidifubesupawe.pdfIn PDF document text
    • http://donaldbermanmaimonidesgolf2021.com/clients/0/0d/0d43fbb8ff91cab41fa1b056c0d912a9/File/muzogi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=the+great+arab+conquests+pdf+free+downloadPDF link annotation
    • 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_off00015408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15408 11240 bytes
SHA-256: b9d1175056fd148f0d4a77dd2f3b29f064cf49a1515623de598644c08e3666df
font_01_sfnt_off00016db0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DB0 17968 bytes
SHA-256: b9d53ed51c544348136983ba1e93b034d876ca650647e350b1cb27c4e533a1ec
font_02_sfnt_off00019bc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19BC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1