Malicious PDF — malware analysis report

Static analysis result for SHA-256 f00be42753862e70…

MALICIOUS

PDF

86.6 KB Created: 2021-09-05 16:58:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 08bd1f05996f25ef53d528fb4bb2a8dc SHA-1: f6272ebbe76ca87fed0cac500812230beb83fe97 SHA-256: f00be42753862e70058eea3c3a6a320a4d856a1a6361a98379ff27f4e058ec98
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous extracted URLs point to compromised websites and link farms, indicating a likely phishing or malware distribution scheme. The file's structure and content suggest it is intended to redirect users to malicious external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://crewmak.ru/uplcv?utm_term=full+text+search+pdf+sql+server+2012 PDF link annotation
    • http://hfengly.dk/skoleportalen/userfiles/file/zewikupemomaz.pdfIn PDF document text
    • https://toromecanicorodeo.com/files/foxepovija.pdfIn PDF document text
    • http://taeguektour.com/FileData/ckfinder/files/20210701_0D20B8DC2E9765E9.pdfIn PDF document text
    • https://gangwontaxi.com/FileData/ckfinder/files/20210629_882E3371E92C8FF3.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c58cacd423---35566770123.pdfIn PDF document text
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/sozaporituxikilozir.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c8851466589---99702937599.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16123e572bd381---raxufizesuzepu.pdfIn PDF document text
    • http://chochosanencino.com/uploads/files/34070308104.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/4d7cac03fbce41a6cfadd2de274b850b/zubokenufoluziserafivuva.pdfIn PDF document text
    • http://gibeaufamily.com/clients/870383/File/57058001790.pdfIn PDF document text
    • https://strategieb2b.com/userfiles/file/puzadegorojog.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16115869548571---kobalitaruzifijeludewa.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105221559286231.pdfIn PDF document text
    • http://actlogistic.vn/upload/editor/files/nanozufuwopasexipem.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/68050528758.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160749666d09bc---bidarevexi.pdfIn PDF document text
    • http://extintoresorigen.com/images/editor/bujovaxanivewakavoforaba.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ae76217e33b---4654520879.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/39590482717.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a19b98af35a---83518539371.pdfIn PDF document text
    • https://morganmethod.com/ci/userfiles/files/wetivonag.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d80c5663ad---95454686204.pdfIn PDF document text
    • http://uhy-th.com/image/upload/files/52424186430.pdfIn PDF document text
    • https://virtrade.gr/userfiles_lybo/file/texazuzomomebore.pdfIn PDF document text
    • https://cryptobasics.biz/uploads/files/17904347579.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_off0000ecf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10508 17708 bytes
SHA-256: ab96523a4792e4b009c3304a9f6ee940110aa6d9252b8d5f381b5ef90549571e
font_02_sfnt_off0001327e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1327E 11084 bytes
SHA-256: 7472981923c2fa4874ce4ad7dc6670ddbcc4befe8a4d5f91fa1af848c7b624c3

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