Malicious PDF — malware analysis report

Static analysis result for SHA-256 26198c1525b9fd2d…

MALICIOUS

PDF

88.1 KB Created: 2021-07-01 01:00:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 8c4eee796615ea72e175f30869945af0 SHA-1: d0b32f9988774f228b81189d637cfbb919f8e8b3 SHA-256: 26198c1525b9fd2d60e659c0d4e7c2b35d22a9ce6e1d77a4414987786e766782
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or are part of link farms designed to obscure the final destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The file's structure and URL patterns suggest it's used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://remont-elektro.eu/archiv/file/sigapagulotodusalakasaz.pdf In PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16074d86dc5291---miwababix.pdfIn PDF document text
    • http://www.shadowrangers.live/img/files/60008320910.pdfIn PDF document text
    • https://bonacorsi.it/file/63897415685.pdfIn PDF document text
    • http://thaimassagemodel.com/ckfinder/userfiles/files/semagaduni.pdfIn PDF document text
    • https://soft-print.pl/app/webroot/media/files/damanukalodibejawapobego.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac24d2128cf---rilupifit.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/zufubafovupuzebi.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/gikugeto.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/26d04b2e199df4c031a4a6f5a6169c63/27418820582.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a08bf78118c---nutaboveke.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/45548ab9866a6c2ba5316489ecce993c/7548777448.pdfIn PDF document text
    • http://learnazia.com/fck/imagesfile/xanodilizozebiwinulu.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/806c2180a3a9ec4a2b86f1924504078e/kejofapu.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ced747cd58---ganibaxapugotarome.pdfIn PDF document text
    • https://menlopark.com/wysiwygfiles/file/jamilamonolumo.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607139105febe---32651576802.pdfIn PDF document text
    • http://exmar.it/foto_fck/file/20477652234.pdfIn PDF document text
    • http://boeschfamilytravels.com/clients/43210/File/kijalerepoxidozuzi.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/rigoxunosewetexonewizazes.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/58613389293.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160c5633a9ccfb---xumelesepa.pdfIn PDF document text
    • https://ferropula.hr/files/popakod.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/74751087203.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=what+is+a+safety+procedure+manualPDF 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_off0000f5b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B3 11092 bytes
SHA-256: 5b297925d13ffa2407452b5b80a72365b6dcfdb31a131e6d4c883ae2ed7a8d05
font_01_sfnt_off00010f66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F66 16276 bytes
SHA-256: 36637289ac015d8bba3954b0d4aee79900a942480e3680120732604bf81c4d90
font_02_sfnt_off00013976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13976 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1