Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cda3a755ebc4624…

MALICIOUS

PDF

93.9 KB Created: 2021-09-04 23:54:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 642e89ec193ce03949f63075b01d4c36 SHA-1: 6da82f8c384eaf85d3ea71b927a06be11128eedf SHA-256: 1cda3a755ebc462467dc78556b9b268e165a1b666e0371e664accdffb5fbb38b
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the nature of the links implies potential exploitation or redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://terminal.hr/userfiles/file/tevuletetevev.pdf In PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b2404b56d43---92783076658.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/d40e50e588b511b7501dcff0aa766dad/55497203488.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/ee2dcada522c0a2e39c9d2aab9945ba7/nogib.pdfIn PDF document text
    • https://rubyyadav.com/nbloom/fckuploads/file/xezevusoxitixenanuva.pdfIn PDF document text
    • https://mamadona.ru/ckfinder/userfiles/files/terilagorofixibelebode.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/hd0h79b3aj8mhc8lioc9r3j5u6/makijagewemi.pdfIn PDF document text
    • https://natyabio.com/uploadfiles/lezanoveb.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/21045266068.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/9e3a013b32ea7339fbdc5d548748ce44/kuwomeg.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/2814a019d0f135a043f1fbbf23be42ac/33515335553.pdfIn PDF document text
    • https://nonbodepsg.com/uploads/files/5790977101.pdfIn PDF document text
    • https://p87.hu/files/50022417477.pdfIn PDF document text
    • http://vattucongtrinh.com/userfiles/file/68104177552.pdfIn PDF document text
    • http://lhdrum.com/User_File/UpFile/file/20210709112443_a2lqdXRvc3U=.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/6oe7qigbjfr58u809sgame7d45/dadedinedux.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/d1ea1ad3060a887c25d7148ea4f2585e/bitoxunapopokoges.pdfIn PDF document text
    • http://qca.ch/userfiles/file/kanititubewopaba.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/jomizax.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6287e2d129---13490965526.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/0j9lb0ffe19a0jld33hlm8vmhb/18641840930.pdfIn PDF document text
    • https://altinhediyeler.com/calisma2/files/uploads/zifogugawebobamid.pdfIn PDF document text
    • http://ricarda-allegra.de/userfiles/file/46467075200.pdfIn PDF document text
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612e5dc1164ce---27736509718.pdfIn PDF document text
    • http://ourgans.org/userfiles/files/88792849641.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=poultry+house+construction+guidelines+pdfPDF 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_off0001095d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1095D 18268 bytes
SHA-256: 00f42bcafbc1f09b2897df21356209aba92f791ea43655131e01e53f0ac2284c
font_01_sfnt_off000137e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137E9 10952 bytes
SHA-256: 0f68b48c56cbfb1a02bd313df70e26d2b6b920b401166a1b67f52427bfd2e77b
font_02_sfnt_off0001511e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1511E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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