Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d0d5a16b9501336…

MALICIOUS

PDF

97.4 KB Created: 2021-08-31 01:00:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5440b1cf3a8234fe6786b341b0e7a78d SHA-1: c5b4bf2d61a2ec73415d4bb9bbe3e484e975fc8a SHA-256: 4d0d5a16b95013366e61ee09a3fe3a0045efef5cc02c67ceb680d9b03865ede6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious. It functions as a link farm, containing numerous embedded URLs pointing to compromised CMS uploads and disposable hosting sites. The primary purpose appears to be redirecting users to potentially harmful content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://vegan-eshop.cz/data/file/milodaxukavolom.pdf In PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611b8c2327f63---besewagato.pdfIn PDF document text
    • https://llibreriaha.com/img/events/file/75666344974.pdfIn PDF document text
    • http://ehoron21.mn/uploads/files/pakib.pdfIn PDF document text
    • https://almuhja.ps/ckfinder/userfiles/files/90050411211.pdfIn PDF document text
    • https://theurbanthinktank.com/files/xigam.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c1bd382fb---xijanatap.pdfIn PDF document text
    • http://sgrdinstitutionspandher.org/sgrd/userfiles/file/60126746527.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/2c8f762d113dedfcb629d26240cb6dbd/79872786393.pdfIn PDF document text
    • https://gymlesgeants.com/upload/editor/file/74051875655.pdfIn PDF document text
    • http://moiarchitekci.pl/pliki/file/29460725074.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/648fe07d49ab63daa413359c39416f3e/pefigapovefij.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1607f753639e55---nufovivekiduloxedafum.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609f5b90e9f27---jitofadinobet.pdfIn PDF document text
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/9465678660.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e26e3bc6d8c---54711821795.pdfIn PDF document text
    • https://assistenza-termica.it/file/22163287964.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16113b01625dda---25532743278.pdfIn PDF document text
    • http://china-zub.ru/userfiles/file/85416587161.pdfIn PDF document text
    • http://elcampoeco.org/FCKeditor/file/77012665117.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b08de3c583---nuzefisafexet.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=the+girl+with+the+dragon+tattooPDF 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_off0001157d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1157D 10408 bytes
SHA-256: e4e3eccc101b188ad4b389e3a3a4193ebfa02d4200afcdfe617a072159e4cab0
font_01_sfnt_off00012ccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CCB 19620 bytes
SHA-256: 03c2087df1fa7ead524b13e804e3098894be6d97b57e55e12d5ba42f4162569c
font_02_sfnt_off00015f39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.