Malicious PDF — malware analysis report

Static analysis result for SHA-256 69d11026a32f9307…

MALICIOUS

PDF

97.5 KB Created: 2021-07-14 05:28:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e42bf0799e60e7381543fc6ca2fa207c SHA-1: 1a19c87568c396a0a3845a203e7ad8711631e191 SHA-256: 69d11026a32f9307825380535836b1aee6468f09dd84678d61e785e60a3f35ca
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 WordPress sites and disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF used for initial access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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 http://stauarchitetti.eu/userfiles/files/xajusitixowi.pdf In PDF document text
    • http://reelproductionshd.com/userfiles/file/wukesologo.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/94f706b86de303a361379921afeceea4/90242515616.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/0d16bf8dc4ab4897e50322e7a5e2cc46/31429898341.pdfIn PDF document text
    • http://cpgny.com/userfiles/files/wokotixilujorilejol.pdfIn PDF document text
    • http://thecreditcrisis.net/clients/73966/File/suwobadametodapetitilegim.pdfIn PDF document text
    • https://peintures-descours.fr/fichier/files/84210395768.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/c20f299ab23512228ca44610a37350d2/pidixufibafafax.pdfIn PDF document text
    • http://mpti.ru/userfiles/file/nelitomapifuforemu.pdfIn PDF document text
    • http://axwelindia.com/uploads/remopaxa.pdfIn PDF document text
    • http://jandebruijn.com/uploadimages/files/87748179175.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/sulakozewobebaw.pdfIn PDF document text
    • https://foulardfotografando.it/file/futinib.pdfIn PDF document text
    • http://be1971.com/clients/a/a1/a19be2fc4cf8b198b52f296748481ce5/File/suwavowe.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/basafowevajo.pdfIn PDF document text
    • http://vngo-cc.vn/cooker/public/files/ginevonokir.pdfIn PDF document text
    • http://watdoenwevandaag.nl/upload/26515425436.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16199096212677.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a1bfe99c0---8953014951.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0e28be859---zamolixemi.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a980909d279---mumalulolufalarupitevew.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cce23c943f0---14040336515.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607178b8640b7---semesaxewakiduwor.pdfIn PDF document text
    • https://sayurhijau.com/contents//files/nizopinat.pdfIn PDF document text
    • http://bona-agra.pl/Upload/file/87476252879.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/1be8a2f6019740157dae25a33e06e398/66595413757.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=sleeve+to+rny+revisionPDF 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_off00011e42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E42 10192 bytes
SHA-256: d8ed662f8ea41442fe3129317d8e02f2b46a3e6944682dc8996a001122cfc4e5
font_01_sfnt_off00013534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13534 16732 bytes
SHA-256: c5587c6164c8862f5dfe5dc22c7f8dfd08637ee5783e1e53ae9ec7c42118e25b
font_02_sfnt_off000160a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1