Malicious PDF — malware analysis report

Static analysis result for SHA-256 8554dbd177ff9625…

MALICIOUS

PDF

81.1 KB Created: 2021-09-06 05:24:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 96ef97e92c7966960462ddc889d567b3 SHA-1: 2545be45c6fa8b6dd55eaa910ca19748273dfe8e SHA-256: 8554dbd177ff9625285f83796849212b7c70e04192a08c9da8c55fe107faad5f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://crysiq.ru/uplcv?utm_term=predicting+precipitation+reactions+worksheet+answer+key PDF link annotation
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/9fa356381b42c11f3e720031350aac91/toruwetexugovijituruvile.pdfIn PDF document text
    • http://specimport.by/files/files/84031150048.pdfIn PDF document text
    • https://ropaalmayoreo.com/images/userfiles/file/84858902694.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610e9d6a776ba---nawegemuruta.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d55f7b54752---86470147758.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/fb7aba5d42629372db491a5445c3ab40/38231588943.pdfIn PDF document text
    • http://guojingmall.com/userfiles/file///86013233795.pdfIn PDF document text
    • http://maketmaster.ru/admin/ckfinder/userfiles/files/92738861323.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/v1etgc09lpg6hor1lp3p7ikkn6/15749907467.pdfIn PDF document text
    • http://benhvienlaptop.biz/userfiles/file/9821103729.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/99f230ceb9a821a3134e126f5d7625ed/fabofibazakawudiroraja.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/nipurukudubomiximawem.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/7f0e6a42cac678b8be1605c76e7fb29d/91427509644.pdfIn PDF document text
    • http://saokienviet.com/uploads/image/files/rexadabolabamulenomed.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/29173927598.pdfIn PDF document text
    • https://msvadba.ru/files/file/62660058945.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/78687aab5301c9fcc44878238c84074c/16089980006.pdfIn PDF document text
    • http://mimarkamilozkartal.com/userfiles/files/93094761873.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16094db0d8b9bb---59983178445.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/1jop8r4lolmv9108hls6qf8sn1/luwufawobuwir.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b050a614c3a---betikeg.pdfIn PDF document text
    • http://avandcie-automation.com/ckfinder/userfiles/files/wamusalixezunavobiw.pdfIn PDF document text
    • http://musiconthebay.org/clients/2/26/269dd5bc96e197da989a8dccc71442af/File/42393369787.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_off0000d764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD764 11040 bytes
SHA-256: c532bf2369bedf257294397ff2d75c5365696967801ba4dc21cd44a1d8f2b878
font_01_sfnt_off0000f0eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000108fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FD 17404 bytes
SHA-256: 6772dd12dbeb6ed3af4cfacb3a0aa80ee16f0dbd8be92bc5a941e2f944736ffa

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