Malicious PDF — malware analysis report

Static analysis result for SHA-256 be01f48418fb4073…

MALICIOUS

PDF

97.3 KB Created: 2021-06-26 23:13:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f7fe22dc3b7a4a12b2d72448d97b9cc7 SHA-1: ada8647fd04f67e607f8d885bde7ebfa7d0a99e8 SHA-256: be01f48418fb40737236d6278a0a5f86bae92f42ba17c820a84315f2ff96b82c
196 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to various PDF files hosted on potentially compromised websites, suggesting an attempt to distribute malicious content or redirect users. The document also includes an explicit instruction to disable security software, which is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://kuzfarm.ru/images/file/46050816885.pdf
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/f6gvs277oh1b6lqeg2i2k4rmi3/41230579592.pdf
    • http://backupcenters.com/userfiles/file/salerafejedadewomirinup.pdf
    • http://alexdisinfestazioni.com/userfiles/files/rakupavije.pdf
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/6e68e2k1bbbb8p3e63lcrr25uh/divudivu.pdf
    • http://goref.ru/files/file/56296623770.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca7e40e599---52130118534.pdf
    • http://buffagiuseppeinfissi.com/userfiles/files/mokisixogonomog.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/d56673d180bb34439c83928a5c248b3b/ropevaretifofupuzoxetog.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/d68bcfb4eb2369c80d9e747179f2426f/54544503727.pdf
    • https://brahmagnanam.org/fck_uploads/file/mitaju.pdf
    • https://aradovan.com/userfiles/file/xedodagesu.pdf
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/8c4da863896f16b8906933a59114ffb4/zubane.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb0deabc9e4---dibelar.pdf
    • http://pijntherapie.be/uploads/files/kekajugezuz.pdf
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/m0huo8mku1a7mhc13chmdsq8e4/vivuwokitodabasevifotidos.pdf
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/tr2livfr39896chtjsgac0l07u/jujemitufawugu.pdf
    • https://sentinels.ro/userfiles/file/gigopaso.pdf
    • http://sam-global.info/files/file/87661298159.pdf
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/5c566e3b9d53cb407c65409d72f8b071/82456168524.pdf
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/egmorint52v4f7e05n3lj42ndp/26662305972.pdf
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16071bf5488665---gexinalumezo.pdf
    • http://www.toptehnik.si/images/20286329458.pdf
    • http://apcmagon.com/userfiles/vefubedebot.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/d10e45ce42c245c05689255f68635bba/jipixeb.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=mechanical+engineering+interview+questions+answers+pdf+free+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000116b4.bin
69b66d0f0b00a6749ba2092fc7e7320d99f002f1384750bf49913eb4c1d4846d
pdf-font-stream PDF embedded font (sfnt) at offset 0x116B4 17648 bytes
font_01_sfnt_off0001454a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1454A 16792 bytes
font_02_sfnt_off00015d61.bin
1409e728a44097d04f5cc12cde78f23add97bad140ef8496ac4be3662885e488
pdf-font-stream PDF embedded font (sfnt) at offset 0x15D61 11292 bytes