Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2ce8e8ade776dcd…

MALICIOUS

PDF

82.8 KB Created: 2021-09-18 13:51:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2f6b1a71597516c718ac0a02be2dc1c1 SHA-1: cbc5ced7a880715fe83246de69b195c2e4daa915 SHA-256: f2ce8e8ade776dcdabbe2afcc79227c5c6d6321530021d0e4aca9222374d2421
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and link farms pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution lure. The embedded JavaScript stream further supports malicious activity, likely used to obfuscate or execute further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://drafthe.ru/uplcv?utm_term=bubble+shooter+play+online PDF link annotation
    • http://elisa5888.com/shopadmin/upload/files/wutabu.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16139a14d16bba---65414505976.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fcf829a32e---nosofanafefepel.pdfIn PDF document text
    • https://kolegium.inaheart.org/upload/files/41419290819.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16143be0c70480---woredugibife.pdfIn PDF document text
    • http://sangiorgioautoservizi.com/userfiles/files/18038923569.pdfIn PDF document text
    • http://awards.nl/img/cms/file/13341527890.pdfIn PDF document text
    • http://soleilboo.com/images/uploads/files/fujobujawu.pdfIn PDF document text
    • http://vizit-k.net/uploads/editor/files/81431291205.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161453dc3dd138---86831604438.pdfIn PDF document text
    • https://giyimkent.formenemlak.com/upload/ckfinder/files/zolilewejebi.pdfIn PDF document text
    • https://istocdukkan.com/userfiles/files/78693616976.pdfIn PDF document text
    • https://rotterdampools.com/contents/files/gaxesisureju.pdfIn PDF document text
    • http://shmgec.com/Uploadfiles/files/xejorivevafojunededo.pdfIn PDF document text
    • http://herbwaterthailand.com/userfiles/files/72183371765.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/20558606338.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/aea78518524c897cb7ad402a9e053877/32915521834.pdfIn PDF document text
    • http://rkenterprisesonline.com/FCKeditor/file/wujetupafawex.pdfIn PDF document text
    • http://diamantina-joaillerie.com/ckfinder/userfiles/files/94603620047.pdfIn PDF document text
    • https://tidurmalam2.com/contents/files/vusizubete.pdfIn PDF document text
    • https://bodzlomu.com/userfiles/file/lamodenibumesarab.pdfIn PDF document text
    • http://cardealer-space.com/js/upload/files/nulezanudaxir.pdfIn PDF document text
    • http://engineersclasses4competition.com/files/others/jijosidize.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_off0000e16e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16E 10756 bytes
SHA-256: 249b764307b08ae4f05fceb80d6b7c5d2099284543a2394e5f5652213690911b
font_01_sfnt_off0000f9f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11209 16940 bytes
SHA-256: ce33c3618d83439a142f6f3ea4a1daa220a5a24430c9e763aab2320d1c8ffd1a

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