Malicious PDF — malware analysis report

Static analysis result for SHA-256 f110fcbb51b224fe…

MALICIOUS

PDF

127.3 KB Created: 2021-08-05 05:32:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9f12448315c572899af72dc6a9417b46 SHA-1: 133d6a5feface3385c403f45e2013c3b278f17a3 SHA-256: f110fcbb51b224fe31e25d71342dee644647102550f8272f4098b0560127843f
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Several heuristics identified the document as a link farm, pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The embedded URLs and the nature of the heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://studio45.live/wp-content/plugins/super-forms/uploads/php/files/25oejt78jgn5mfgauebcr27oak/susapomibezudatibene.pdf In PDF document text
    • http://kstarsmall.net/userfiles/file///danetowabu.pdfIn PDF document text
    • http://bygreenpure.com/userfiles/file/tawipok.pdfIn PDF document text
    • https://mosallaesf.ir/uploads/ck/files/kemoded.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608a68cfa2765---82848077951.pdfIn PDF document text
    • http://purifoy2020.com/clients/1/11/118d8b7ee1ea4bab8fb19da95c56260f/File/baruvawoxiloradeso.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/zefapakulazi.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/5qnle4mcc0af9f6toie8ji1nno/fijibewosisibogitanak.pdfIn PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608970546a7bd---tepixosugubu.pdfIn PDF document text
    • https://vasantviharproperties.com/userfiles/file/61209816590.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/jikukezirenux.pdfIn PDF document text
    • http://daiichilogistics.com/uploads/news_file/91052860199.pdfIn PDF document text
    • http://petersonspann.com/clients/3/32/32c4b2f41fa698b5b938e848169c8dcb/File/3787673539.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/zorukijuruba.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983314de699---nivazegewumajinileso.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160786b52cd993---lugale.pdfIn PDF document text
    • http://yuha.be/_files/file/98538199875.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b20b7b56d16---21673166819.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/91648779395.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a622528742e---98541290868.pdfIn PDF document text
    • http://hevolta.com/upload/file/mevizosokedon.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ea720a2ac---69101625088.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/61958559028.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=subramanian+swamy+books+pdf+downloadPDF 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_off00018d7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18D7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001a594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A594 11036 bytes
SHA-256: f277a6d047db5095ea4096b5d7c8ffad7df7e0c44e32716c9dd8b2ab8d86ac5c
font_02_sfnt_off0001bf03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BF03 18100 bytes
SHA-256: f4fe8592bebdc06c733daafeec87f6e0258dfcec8518f6d73a370aec73d6e04e

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