Malicious PDF — malware analysis report

Static analysis result for SHA-256 7be7c25c1413d7ec…

MALICIOUS

PDF

83.9 KB Created: 2021-09-06 20:13:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: eec0f2ec8986361bcc35de3aed1d8180 SHA-1: 50e580d12fdcc02e2d27c3dc870146a91d5c63c1 SHA-256: 7be7c25c1413d7eceda6b7b279f9e76483435e8db2d7285ef50f30bfbee3b110
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous links pointing to compromised websites, many of which are hosted on disposable domains or utilize WordPress upload vulnerabilities. The primary attack pattern appears to be directing users to these compromised sites, likely for phishing or to serve further malicious content.

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://oniceh.ru/uplcv?utm_term=armitron+wr330+allsport+manual PDF link annotation
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0c0b39208---8452745696.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/70672862842.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/womoxufu.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1608c1f5cb734e---menalesumuraboxujixos.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160d21eea66dac---40484383058.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/2a2e220b2e52742dfb4460f84bf8fdc1/kukixufakituredominepemiz.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/12802875351.pdfIn PDF document text
    • https://adreshosting.com/calisma2/files/uploads/46753378302.pdfIn PDF document text
    • http://tysons-cafe.com/uploads/files/xikijirufusojixud.pdfIn PDF document text
    • http://chinalanpa.com/images/upload/File/minoleruzexomekoxelub.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/20825193056.pdfIn PDF document text
    • https://bakwanudang.com/contents//files/nutup.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/tibupukezetanoliwama.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ab08cd5d929---natemelajibi.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/70138278979.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/4e5735d42cfdd87165acb8fd13c10d5e/49448829345.pdfIn PDF document text
    • http://staresecurity.com/userfiles/file/nufawuwojesesuwava.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/f7ge78096k65i4u4d0i12ksg25/vafobakiwizafabexuzuv.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/5pc2mdr4hqohuutd7h108mbg58/nixufamefikar.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b14f47382---felevugakojajajize.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ecd48eb6e8---19724581076.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd53b63313---70019759461.pdfIn PDF document text
    • http://grandp.ru/userfiles/file/17246012151.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/gifuwesoramozeguramor.pdfIn PDF document text
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077d92da0d50---60775862714.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16087180d069ec---vadutiwinewuzizutofegim.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_off0000e2bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BF 17944 bytes
SHA-256: d62c5049d2a44c87a7a5cebb4e4bb815e0f7a28b15f1ff53fe1b97f0073d9264
font_01_sfnt_off00011080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11080 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12897 10740 bytes
SHA-256: b4be7a7413c4606118a16d724cbf67e8e81a0a3096889748b0c2c2d259f26673

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