Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffd7f77d47c0ded2…

MALICIOUS

PDF

97.0 KB Created: 2021-10-11 03:12:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 054e0c1cf9a5c12bda4158e71777e501 SHA-1: d3f6f396800ce192194725e9b8fc8829e9ef9c35 SHA-256: ffd7f77d47c0ded27e4fa3d0e5ea9935f9d23fc952ebc198eecb64510527c529
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as containing a link farm pointing to compromised or disposable hosting, with a high ML score and ClamAV detection confirming its malicious nature. The embedded URLs, such as 'https://garglob.ru/uplcv?utm_term=the+most+beautiful+actresses+of+all+time', are likely used to redirect users to phishing pages or download further malicious content. The document's structure and numerous external links suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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=the+most+beautiful+actresses+of+all+time PDF link annotation
    • https://bulendengin.com/upload/ckfinder/files/diteg.pdfIn PDF document text
    • http://wellnesszeewolde.nl/site/data/ws/files/25359301373.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/ee0a5c6e3e214bbce17cf4e3fdd3aa3f/56488586258.pdfIn PDF document text
    • http://status-go.net/gfx/userfiles/files/31403701425.pdfIn PDF document text
    • https://www.babetravelling.com/ckfinder/userfiles2/files/retaz.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613c4b246d69d---80946540520.pdfIn PDF document text
    • http://teacherandtraining.com/coj_u/KK/userfiles/files/55710720636.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/s0gqjnj1as4m0n7mgls5dtksog/fuwelerafaxanifasixixatud.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16150c3901a2ef---ritigovef.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/n6on4mosaa7t9eiptv2c4fqhn2/30191086791.pdfIn PDF document text
    • http://zgic.ru/!upload/files/luwewu.pdfIn PDF document text
    • http://professionalcatererspaul.pageindia.com/resume/cms_files/files/77200423239.pdfIn PDF document text
    • http://hk-sai.com/ckfinder/userfiles/files/91027537145.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/5fff633e9a46e6405cdd998052d58a2c/mirukexosabojalew.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/16157ff6daaf76---juzemibi.pdfIn PDF document text
    • https://em.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/94043624270.pdfIn PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/zosavi.pdfIn PDF document text
    • https://pmsp-me.com/userfiles/files/tefapuvowozoxipodusa.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/81261699372.pdfIn PDF document text
    • https://realxenon.ru/uploads/files/mudugubimetuxekiwo.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/161430efad76b7---vamepegiva.pdfIn PDF document text
    • http://yuhenganquan.com/userfiles/file/20210902205913_160043016.pdfIn PDF document text
    • http://zatoodesign.com/userfiles/files/80668115029.pdfIn PDF document text
    • http://swaptoys.org/ckeditor/uploads/files/xamirubipusaso.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_off000113fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113FC 19020 bytes
SHA-256: 1653f8f9bf756b4bcaa51a3c603042b240efbcafe9807169ad74721390e35dca
font_01_sfnt_off0001456b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1456B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015d82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D82 10700 bytes
SHA-256: 7301c74b8f2a4198d085a4f0480598d58ebbace46f9764091881eaf9021b12bd