Malicious PDF — malware analysis report

Static analysis result for SHA-256 e01387bb97e99e30…

MALICIOUS

PDF

68.6 KB Created: 2021-10-02 11:33:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 06fd7c22e6bd55151192d2c46075460e SHA-1: 558b91165308e98c532f33e970360a9b88923fad SHA-256: e01387bb97e99e301202b5edb9bc5d1fced6cc41707c262099bc3db3ddcaeabe
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to external sites, some of which are hosted on compromised CMS uploads or disposable domains. The presence of external URI heuristics and link farm indicators suggests the document is designed to redirect users to malicious content or phishing pages. No scripts were extracted, but the overall structure and URL analysis strongly suggest a malicious intent to lure users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://gornjastubica.hr/files/71814272006.pdf In PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/guwuj.pdfIn PDF document text
    • http://networkinglikepro.com/ckfinder/userfiles/files/11745765256.pdfIn PDF document text
    • http://salukool.ee/upload/userfiles/file/miropoforap.pdfIn PDF document text
    • http://mallenmediations.com/mallenmediations/images/userfiles/file/rotuf.pdfIn PDF document text
    • http://smelawservice.com/file_media/file_image/file/82986338132.pdfIn PDF document text
    • http://hb-hospital.com/file_upload/fck_upfile/file/bojekawimenibev.pdfIn PDF document text
    • http://xn----ctbguteehkho5h.xn--p1ai/ckfinder/userfiles/files/52292150666.pdfIn PDF document text
    • http://donghozibistore.com/luutru/files/63681413725.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/e45f68986bcaad28e75630337ea60d0f/23024384314.pdfIn PDF document text
    • http://maternites-catholiques.org/ressource/site-image/files/juposakisososup.pdfIn PDF document text
    • https://renetravel.ro/images/files/nowemexizefufibumajifek.pdfIn PDF document text
    • http://ieeepes-thailand.org/app/webroot/files/files/xerunotatuwejojawukar.pdfIn PDF document text
    • https://chingchia.com/uploads/files/202109240017288105.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/30d65b8d04a7aed95f557182bb3dd2c4/32676459259.pdfIn PDF document text
    • http://thanhnhomdinhhinh.net/uploads/files/11936416461.pdfIn PDF document text
    • http://polishingmarblefloor.it/userfiles/files/nekaruxajusomuwabamera.pdfIn PDF document text
    • http://eikenhorstgroep.nl/userfiles/file/19342372219.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/p70e3k83nt8rof4ikne80ldtc4/gojoriwodaxafe.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/jititirowajifurijibumul.pdfIn PDF document text
    • https://kuraniterbiye.com/resimler/files/fufizof.pdfIn PDF document text
    • http://ptairsupply.com/userfiles/file/musidi.pdfIn PDF document text
    • https://homestayhoian.thamtuddt.com/uploads/image/files/12443388470.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=cost+to+frame+a+1500+sq+ft+housePDF 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_off0000ae7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE7E 10820 bytes
SHA-256: c398493c949351bee5eb23e9dc4f0ded3fa1f90c345775461d2883dec1bc10ce
font_01_sfnt_off0000c79c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC79C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000dfae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAE 15000 bytes
SHA-256: 064a72d99b48da60bbcec3dc49a5c7ca426c9afa74544de122f29f7eaa2fb603

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