Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed09745e94ef7e8d…

MALICIOUS

PDF

81.8 KB Created: 2021-09-10 20:51:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 87518c41fe0008a672fe516603d0d861 SHA-1: 6ae2236ad1e9a88edc9ce2616f17c61606a42bc5 SHA-256: ed09745e94ef7e8dd168a6d59d005a37ecb86f33f6a15cbae896b45ce8e5c2b5
176 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The 'QR code lure' heuristic further supports the idea that the document is designed to trick users into interacting with external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/98c47be89bcee90c1c216389b4220ff5/xogomaxezesipeduwa.pdf In PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/dbda3d54669e5fc8ff2585bb8dd2ff8b/pozawivodatekejabe.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b582cea3ad---guzikafolenaje.pdfIn PDF document text
    • http://sanchariglobal.com/userfiles/file/sevaxegetutumovav.pdfIn PDF document text
    • http://softwaretesting.kr/club/data/userfiles/file/20210909092140.pdfIn PDF document text
    • http://digjamaica.com/app/webroot/files/wuvizamudimaxa.pdfIn PDF document text
    • http://ppogrimall.com/upload/editor_image/file/62847522825.pdfIn PDF document text
    • https://hkbca.org/UploadFiles/file/20210905041054182.pdfIn PDF document text
    • https://anakaygame.net/calisma2/files/uploads/31602350295.pdfIn PDF document text
    • http://news-hk.net/uploadfile/file///vupajijaf.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/lazukuvujuwivijof.pdfIn PDF document text
    • https://cometsecurity.in/admin/userfiles/file/tulizep.pdfIn PDF document text
    • http://ed-union05.ru/files/file/lugabivuxepisawe.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/a017e8846a565e6d3f9d35fe107db9b3/8389705269.pdfIn PDF document text
    • https://rlmahtani.com/userfiles/files/13927262770.pdfIn PDF document text
    • http://dpsnowodworze.pl/userfiles/file/59100495973.pdfIn PDF document text
    • https://tideandtigers.com/ckfinder/userfiles/files/75120745291.pdfIn PDF document text
    • http://sjhtractor.com/d/files/nepilajasirenasegowa.pdfIn PDF document text
    • https://7foro.exceltur.org/exceltur_nuevo/ckfinder/userfiles/files/mukegaropurituf.pdfIn PDF document text
    • https://adian.eus/files/galeria/files/19456954482.pdfIn PDF document text
    • http://pololanna.com/user_img/files/96561157522.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/30498123696.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=pok%C3%A9mon+go+friend+qr+codes+2020PDF 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_off0000d761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD761 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF78 11148 bytes
SHA-256: 5ee4e3ead63b8fa08eceafc7ad23b6f103ae56a23f5d32c9140ce83e2f670aef
font_02_sfnt_off000108b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B1 17840 bytes
SHA-256: 5e4284e3abe0fec6d2c5b487a27d648e7a5574a503ccf9706a262930c603996c

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