Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3c4797dbb2f016e…

MALICIOUS

PDF

92.4 KB Created: 2021-08-04 04:56:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: daa6eaaaba700e6d2379fcf65a52b014 SHA-1: a008b144b3d4fcd460addecffbc5a25245bf4946 SHA-256: e3c4797dbb2f016e9829b097d8c491d2a774ec77b752f064bb2322f6697db16a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://drafthe.ru/uplcv?utm_term=how+to+study+phrasal+verbs+easily PDF link annotation
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/k91vlspmspbe3pijnd3kkdqkh7/60289118265.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/41093579164.pdfIn PDF document text
    • http://sindikat777.ru/ckeditor/ckfinder/core/connector/php/uploads/files/vejusasofopafu.pdfIn PDF document text
    • https://trvstore.com/userfiles/file/wezuvoganudod.pdfIn PDF document text
    • http://suncreekpuppies.com/clients/8/88/88daaab1104cc9784d9cd8b59d189b35/File/pamopaxisaz.pdfIn PDF document text
    • http://apcmagon.com/userfiles/jogadoxopixatoxafupu.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609c4903e7511---degiporudedogibexab.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4e349f01e6---naminaka.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/qgsjnjcig0r9aeq3ppt3skh411/16827467252.pdfIn PDF document text
    • https://oksushidelivery.cl/sitio/public/files/file/92989144424.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/161091a78dac4d---miteremijetarus.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/fc13151015f161b0677cfef4f8defc40/32190770169.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/86192862281.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/6348949203.pdfIn PDF document text
    • http://churchtextile.com/userfiles/file/pimaperiruwumexivije.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/66718715089.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/dt8pa2v5mmr3ns4i62puenorbo/raguzaraz.pdfIn PDF document text
    • http://bielwod.com/userfiles/file/zufogivenakilodubuwuf.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e0bda0f2402---zeturo.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/l5sl8ip98qmc4hftduco90apin/vagojew.pdfIn PDF document text
    • http://kistours.hu/userfiles/file/92732949508.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/65f229a701a5d0295cf629d05155c8c3/34883538905.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/qg0gbl5rkt0p377pevg09e5mk4/45545866261.pdfIn PDF document text
    • http://jfkanacon.org/data/userfiles/files/87588798877.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_off0000ffe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE2 18196 bytes
SHA-256: 656a36044bcb6be6fac6e415f8dec26706b0d31dafd39d0b43881b683aabf17c
font_01_sfnt_off00012f94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F94 10880 bytes
SHA-256: 417b4b62a6a5151f16cfaccd495fd7c7b1c4613e6a937d302edf506178aa38ec
font_02_sfnt_off000148b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1