Malicious PDF — malware analysis report

Static analysis result for SHA-256 7496e2c94a59a779…

MALICIOUS

PDF

75.2 KB Created: 2021-09-06 22:09:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0c24b6c2616b25ef3b4cc0c19539ef96 SHA-1: 94d3148d1643208e009c00969c269759a617f692 SHA-256: 7496e2c94a59a779c9924dc1d1c85d0c65d1fbbbf56a27cf13bc82648fa442f0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to external resources, with a notable portion hosted on compromised WordPress upload directories. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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://editionsitaliques.com/userfiles/file/mosofivob.pdf In PDF document text
    • http://krupongs.com//images/file/papugimam.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/45398880152.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b00be2829e1---12963371881.pdfIn PDF document text
    • https://dalycity.com/wysiwygfiles/file/modiwenebaso.pdfIn PDF document text
    • http://suseefinance.com/userfiles/file/36921343146.pdfIn PDF document text
    • https://study-abroad-travel.com/ckfinder/userfiles/file/40596144320.pdfIn PDF document text
    • https://bataretak.com/img/files/file/13523519199.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/42bc13f641dc45570dcd12f8588b175a/57408210144.pdfIn PDF document text
    • http://americanewbie.com/userfiles/file/33796326940.pdfIn PDF document text
    • http://toyotarentcar.net/FileData/ckfinder/files/20210629_EE9093CF04E973B7.pdfIn PDF document text
    • https://recapress.com/ckfinder/userfiles/files/39780251609.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16097693992d45---gipimegepeguxujapi.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606caa08af81a---punigoxodagogabanilepoxe.pdfIn PDF document text
    • http://businessnavigator.in/ckeditor/uploads/files/nutoboriputalafazelikupun.pdfIn PDF document text
    • http://oiseau-bleu-morzine.com/userfiles/file/45909513515.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2b179441d---47661816150.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1611abb9e50d93---tobasudama.pdfIn PDF document text
    • http://collectifff.be/imgdb/accueil/files/rubekizafolajused.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/uis5k6p5uje3dg7ss069s0fsip/40572401441.pdfIn PDF document text
    • http://tantusmarina.com/UserFiles/file/sufewafepixamabepin.pdfIn PDF document text
    • http://drprdesaihospital.com/uploads/90041481721.pdfIn PDF document text
    • http://cnzhongkui.com/fckeditor/editor/filemanager/connectors/php/uploads/file/230138438903.pdfIn PDF document text
    • https://radio-aurea.eu/files/file/welivufexopuriko.pdfIn PDF document text
    • http://kppzp.pl/userfiles/file/wozodojuxaxomipip.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e18ec69341---wumaxinidolozu.pdfIn PDF document text
    • http://chiaranannini.com/userfiles/files/64452987563.pdfIn PDF document text
    • http://lohsclassof70.com/clients/3/31/31ca850ff086a58b81c8700e10a01852/File/76985164185.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=manual+handling+risk+assessment+templatePDF 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_off0000c429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC429 16224 bytes
SHA-256: d0805e8d61ca5e703c3e8528493cf6e347c238dac981ddd9b7555deea5603a20
font_01_sfnt_off0000eda3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA3 10904 bytes
SHA-256: f9af18a3438a39b2b149d726400eece48caa95327bb0b10606a0c4e47fab3bac
font_02_sfnt_off0001066b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1066B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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