Malicious PDF — malware analysis report

Static analysis result for SHA-256 7050fe425644dc6a…

MALICIOUS

PDF

92.2 KB Created: 2021-09-18 23:06:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: f006aad1d777510566d33dab9675457c SHA-1: 20536e51318e3790e24f1c83e3d395ea364439d9 SHA-256: 7050fe425644dc6a7c58ba7079310cf2732e018484d8e5463dc7f9536f763654
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress upload storage and other disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://khanikango.in/file/50545552322.pdf In PDF document text
    • http://koreaseals.com/ckfinder/userfiles/files/64973285725.pdfIn PDF document text
    • http://www.fishandcosolicitors.com/uploads/files/731950329.pdfIn PDF document text
    • http://1night2daytour.com/ckupload/files/73672401473.pdfIn PDF document text
    • https://citronixdeflection.com/nbloom/fckuploads/file/nudekowewamirigita.pdfIn PDF document text
    • https://wintechindia.in/ckfinder/userfiles/files/70390913595.pdfIn PDF document text
    • http://workcoop.org/fckeditor/userimages/file/20210917001813.pdfIn PDF document text
    • https://sindhuinvestment.com/ckfinder/userfiles/files/wolidenokukerud.pdfIn PDF document text
    • http://netmutum.com/userfiles/file/64846512254.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161445b7bea499---87552757768.pdfIn PDF document text
    • http://avatars.ru/userfiles/file/feluguxawufawazajum.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144862a1a072---luwaxojijafeborasomefat.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/80813079028.pdfIn PDF document text
    • http://thesciencenetwork.org/uploads/files/53434918278.pdfIn PDF document text
    • http://golfvillageonline.com/userfiles/file/pazakixonu.pdfIn PDF document text
    • http://indianmailbox.com/assets/images/userfiles/files/61534309219.pdfIn PDF document text
    • https://towa-aaa.jp/userfiles/file/dawematukisoke.pdfIn PDF document text
    • https://homestayhoian.thamtuddt.com/uploads/image/files/29488549120.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/xapupusaxakaxowi.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612fea09f319d---lafafekekefokewadugibelo.pdfIn PDF document text
    • http://zulassungsdienst4you.de/bilder/file/pofavovofamegig.pdfIn PDF document text
    • https://fabriziochessa.it/userfiles/file/60563898532.pdfIn PDF document text
    • http://grafiport.com/userfiles/file/wotop.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161409d2878b18---19410323329.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613baa2065f7c---70966112581.pdfIn PDF document text
    • https://autonoleggioassereto.com/file/sibarugaxat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=sapiens+english+version+pdfPDF link annotation
    • 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_off0000fdd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD2 10820 bytes
SHA-256: 6764cc8d9e2eeda687fd7e8023ac2db769786acfcd7c0ab6886a1b2031fcda38
font_01_sfnt_off00011672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11672 19944 bytes
SHA-256: 63157d9294ebffc33a9902e021cd6c9cc531f24ba90d4f4579ccc4f0920d7374
font_02_sfnt_off00014ad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AD5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.