Malicious PDF — malware analysis report

Static analysis result for SHA-256 8df2ae1a7ab23f7c…

MALICIOUS

PDF

86.4 KB Created: 2021-08-19 05:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 330733f66bf2aaa768564fd30e68c612 SHA-1: ac3732239b042bd45d1191a3dc9a6e2bbf7d815b SHA-256: 8df2ae1a7ab23f7cd44faacbfa7b3b738d2fa1ae3e5542f83a41d1c29cfb4158
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms indicates the PDF's primary function is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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=how+to+turn+bose+700+soundbar+off PDF link annotation
    • http://xn----otbb6ahq3d.xn--p1ai/ckfinder/userfiles/files/18788172561.pdfIn PDF document text
    • https://ikitellirezistans.com/upload/files/denokafezugumeterikej.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/f424968be203f00f5e1c4919c4ad93f7/86296770665.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/890185c51b41303d30ad8949f7884be2/valas.pdfIn PDF document text
    • http://life-homeshop.com/asset/uploads/files/68281606060.pdfIn PDF document text
    • http://interwork.sk/userfiles/file/36263592766.pdfIn PDF document text
    • https://atputasbaze.lv/images/userfiles/files/lanapiw.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df91bc4ba50---wetugukitazolubow.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b80755cec48---52246025386.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/46538263510.pdfIn PDF document text
    • http://klusjesindex.nl/images/uploads/vesobepoxawabexifagiwur.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/17350812296.pdfIn PDF document text
    • http://vstarmp.cn/upload/files/20210622_215711.pdfIn PDF document text
    • http://studiogiovannone.com/userfiles/files/fulamar.pdfIn PDF document text
    • http://pvvc.cz/files/76357809858.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/files/voxasugurepanowigezaza.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16090387a212c4---76262819995.pdfIn PDF document text
    • http://tourbusan.net/FileData/ckfinder/files/20210618_35ECB8226B72489E.pdfIn PDF document text
    • http://europavloeren.nl/siteimages/file/17369440828.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/6d44b0fa602a8b25fcb85ebe8344f3ab/kenazefib.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/nunesisubolun.pdfIn PDF document text
    • http://allgeology.ru/ckfinder/userfiles/files/walinetuzi.pdfIn PDF document text
    • http://m4klynchburg.org/clients/3/34/34420611de4c9c7593cf5e5fe12de6df/File/dozukidegasisibibafixamo.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a08fb90ad70---33216993074.pdfIn PDF document text
    • http://harmonie-avion.fr/actualite/files/lowewabiremax.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_off0000eb68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB68 17836 bytes
SHA-256: dbd740261b4f866ccc97653a4ff2a390dd0676f828bd9c1553687c2f0f3c308e
font_01_sfnt_off00011a56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A56 10696 bytes
SHA-256: 16ece93bdec188401cdaff2d46303850a585561c28ac1a47237827727aaa2b41
font_02_sfnt_off00013319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13319 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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