Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f4e69e7c969686…

MALICIOUS

PDF

85.5 KB Created: 2021-06-30 19:57:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 3cf8394430d10487135df7e8b67ea417 SHA-1: 912bd08e16228660b011800f7682c987b8d62227 SHA-256: f0f4e69e7c969686145fd92b9d85e943950d559ff5c759e3ca318044eb9a8f16
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress sites, suggesting it functions as a link farm or phishing lure. The presence of multiple PDF-specific heuristics related to URI and link farms further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://huntic.ru/uplcv?utm_term=is+cocoa+has+caffeine PDF link annotation
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/28l6fht20imfm09kiapndf9if4/gozefepuw.pdfIn PDF document text
    • https://nguoixunghekiev.vn/userfiles/file/4751813629.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/c60cc98df019da0ece87b0b067f36f43/wuzufe.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/435d39a548fd69249afd9cc5f53dacfc/litoxari.pdfIn PDF document text
    • http://kinel-hunter.ru/upfiles/file/73381012405.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160afa569700d7---mefonoduno.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16088853032bf5---semejowapusipajegeforod.pdfIn PDF document text
    • http://k-yoga.org/file_upload/spaw_upload/file/20210522185357.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160847a2f3c088---dupoj.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160836302a543c---zosobamisax.pdfIn PDF document text
    • https://tmtteks.com/files/31548241802.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a74cc6d827d---teledegugugofid.pdfIn PDF document text
    • http://phanphoiongnhuahoasen.vn/upload/files/28026847362.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160aeb35573e47---64930063790.pdfIn PDF document text
    • https://slide-bearing.com/d/files/45005467463.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/f00f5769d019b0db1e135a7c67fd1f11/genud.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/688834ddd0ca6255d33f7827f05d3b21/67959076202.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc34a5e7f1---66664657921.pdfIn PDF document text
    • https://bhsbeacon.com/FCKeditor/file/gapejogumeradire.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d62d856a0---99402503519.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/85e3074ad40aca84cbf399fcff4bdc2e/zulilabeworumurifar.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/nq9s6rfh5htj0k8iltv40nkds5/terojexakib.pdfIn PDF document text
    • https://mebelihome.ru/upload_picture/38442112103.pdfIn PDF document text
    • http://salon-urody-bellis.pl/images/file/wenesifejafevib.pdfIn PDF document text
    • https://implant-drill.com/userfiles/file/kulikunesajumojinepas.pdfIn PDF document text
    • http://dkyangmei.com/uploadfile/file/2021062022324373499.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/1c640634b5987fff6138f8a82d9d68ad/38912260700.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_off0000ed00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED00 10140 bytes
SHA-256: 6b57a92da8ca17c2f7d8d7826ce89d03b75d1c0600b83afc44aa75bea40af939
font_01_sfnt_off00010397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10397 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA9 17348 bytes
SHA-256: c2e2b6aff538e11a8ee1e4e320a5f27239ee9ef5bc2454830b616ab85517023f

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