Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe82cbb4800828d6…

MALICIOUS

PDF

75.6 KB Created: 2021-09-14 12:08:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7a240cbddd5b069fc54eca6b2f5f75dc SHA-1: a64cb65c219c3d0577a7ceef3de51808db83d90d SHA-256: fe82cbb4800828d69e4cade190b4e6ae407a7feee93eb12b4a4b0c9e0f3d97a5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable hosting sites, such as 'garglob.ru' and 'iccj.jp'. The presence of external URIs and link farm characteristics suggests an attempt to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://garglob.ru/uplcv?utm_term=telegram+desktop+for+android PDF link annotation
    • http://iccj.jp/images/uploads/fckeditor/file/xasawaxuwijiwivefexasune.pdfIn PDF document text
    • http://sadiqandsons.com/userfiles/files/84345136951.pdfIn PDF document text
    • https://delcinfo.ru/img/files/files/meseka.pdfIn PDF document text
    • https://giga-tronics.com/userfiles/files/39136459994.pdfIn PDF document text
    • https://topclassgardening.nl/images/file/niramukudekivomubar.pdfIn PDF document text
    • https://undergroundtakeout.com/userfiles/file/dokazilipozodorekuvuti.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133bfed2f562---lugitefunezarusinejede.pdfIn PDF document text
    • http://cl-metalparts.com/d/files/folapenimexava.pdfIn PDF document text
    • http://smart-ventures.ch/upload/Editor_Images/files/xezezi.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/jjoodnmae34bara7qas2nsniav/mutamajukome.pdfIn PDF document text
    • https://ooobelkom.ru/ckfinder/userfiles/files/xapasasor.pdfIn PDF document text
    • http://www.biogreeno.com/cms/ckfinder/userfiles/files/pefizineketonezawijoliwo.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/54851cb97d71377845348b7031c4feee/wulutigixuvubuda.pdfIn PDF document text
    • http://tandartsindex.nl/images/uploads/21723878107.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/5692178628.pdfIn PDF document text
    • http://megalabsrl.it/userfiles/files/78621342331.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/2593eb3e3e4fcd73702b8683f6eac4b2/xirewemij.pdfIn PDF document text
    • https://manhalhealing.com/userfiles/file/tonobupimavelezisudolu.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/fb8d670ecd68a096371b4983fce5633c/60321352552.pdfIn PDF document text
    • http://evola.it/userfiles/files/89934074385.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ddca4c19fb.pdfIn PDF document text
    • https://vinacoma3.vn/userfiles/file/95380210762.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/jatutirabapijiwimoxak.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613fc09acce1b---32548395322.pdfIn PDF document text
    • http://burragebrothers.net/demo/jolie/beta/userfiles/files/68583096862.pdfIn PDF document text
    • http://travelcenterpuntos.com/campannas/file/daluk.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_off0000c3cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dbe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE2 10896 bytes
SHA-256: 86db044e48bf664b7db503cc14e8de7b8b7147e3d550d2d52a2f5c7f6c09280b
font_02_sfnt_off0000f4e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E7 17132 bytes
SHA-256: 2eb184f193b1338f5446f113cc5700dbddfd4efd6ec1d58d02f09a23c9c94ad4

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