Malicious PDF — malware analysis report

Static analysis result for SHA-256 9782386ce4349ce5…

MALICIOUS

PDF

71.9 KB Created: 2021-08-30 04:35:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 37e025ae67440c24403d675af5c01d08 SHA-1: eeab2f873e094eaff1648d1c707bdcb1354e88d4 SHA-256: 9782386ce4349ce50f66f2b94a722817e89766665405dd61a5531cc1167356ce
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a large number of external URIs, many of which point to compromised CMS upload directories or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the execution of malicious code or redirects the user to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://garglob.ru/uplcv?utm_term=grey+eyes+with+central+heterochromia PDF link annotation
    • http://immopolignano.lu/images/9511452985.pdfIn PDF document text
    • https://linlinline.biz/js/ckfinder/userfiles/files/puvisotozomaves.pdfIn PDF document text
    • http://creativecoms.net/userfiles/file/57761783302.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/3p8gtun3mgoohkgnbncrkb1ii6/zofupuwu.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807b83049bf---75810488904.pdfIn PDF document text
    • http://mchs67.com/clients/6/60/601da637195afcc8544498be66ee72b0/File/8688972672.pdfIn PDF document text
    • https://creteservices.com/FCKeditor/userimages/file/29013838124.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/d65b5c05e90ce6db333854057f97642f/kanevorujovi.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/8aa2482e66133ef3b6290d2de179ccc6/94556198845.pdfIn PDF document text
    • https://grup-insaat.com/userfiles/file/sifuwaluwig.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160860ee6265d0---1413685606.pdfIn PDF document text
    • http://getsolarny.com/userfiles/file/54447568935.pdfIn PDF document text
    • http://ca1970.com/clients/10044/File/menikeromimufitolalenu.pdfIn PDF document text
    • https://rtvpuls.com/ckfinder/userfiles/files/28328784701.pdfIn PDF document text
    • http://www.mmalappeenranta.com/tiedostot/files/52510350924.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/c2dd9951452d062bf77e8ccc05f065c6/mewibexa.pdfIn PDF document text
    • http://ctkupavna.ru/upload/file/senatugonok.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/a6ej0jtr1ec5o68cj37ofaugld/zugega.pdfIn PDF document text
    • https://atl-50.com/files/file/tolanalemuferunofis.pdfIn PDF document text
    • http://epicridesnepal.com/files/girusimebuxexumamope.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608a5b038fd84---pokatun.pdfIn PDF document text
    • https://tckontrola.hr/files/dedozitemube.pdfIn PDF document text
    • http://unsersohn.ch/images/file/lulubemofox.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_off0000bac6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAC6 15080 bytes
SHA-256: d45d4e1ab98b8e0fb93a9d51c30c0a4e6141b6f4029da8f0cdc61432b3093fc9
font_01_sfnt_off0000e0c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C0 10732 bytes
SHA-256: bbd62cd75e47051b1bf37add3598b6e3a0e82f9907ed2896bf9ba86b0e906049
font_02_sfnt_off0000f955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF955 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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