Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8c2302078bc2787…

MALICIOUS

PDF

71.9 KB Created: 2021-09-20 13:02:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d6443c96f5e2b0a3dfad9d1a4f613d1c SHA-1: 9e5c2c1921d9b301c2200a661683843efdc933da SHA-256: e8c2302078bc278773419abbc5270c64c2d04d11af72899d376622a3447bc891
146 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to link farms or potentially disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of a 'QR-code redirect lure' heuristic further supports the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://alajwakh.com/uploaded_files/userfiles/files/tefopigifirefov.pdf In PDF document text
    • http://pass38.com/images/contentimages/files/90527005237.pdfIn PDF document text
    • http://cuanhuadanang.vn/uploads/image/files/lezuzozamejogoridi.pdfIn PDF document text
    • https://fundacionamigosdelmarcaribe.ong/ckfinder/userfiles/files/fugogunoselazazulige.pdfIn PDF document text
    • https://0a3exp.com/upfiles/editor/files/zepufawivokolafivowu.pdfIn PDF document text
    • https://giasidaily.com/uploads/userfiles/file/48831287332.pdfIn PDF document text
    • http://westernstudioservice.com/admin/userfiles/file/59539637242.pdfIn PDF document text
    • https://kotypsy.pl/ckfinder/userfiles/files/pinemuwubujefekepifijadof.pdfIn PDF document text
    • https://sicurezzaips.it/uploads/file/8003937531.pdfIn PDF document text
    • http://laser-piskovani.cz/democms/userfiles/file/xijidawevubefabarus.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613edcb4f0daf---pereresorumakizizipumugub.pdfIn PDF document text
    • http://ammk.sk/userfiles/file/66346893045.pdfIn PDF document text
    • http://cosyromania.com/media/file/nadelojusimagit.pdfIn PDF document text
    • http://galaxyjewel.cn/uploadfile/files/ximametajowatewujeti.pdfIn PDF document text
    • http://car-zone.sk/data/data/file/51364157732.pdfIn PDF document text
    • http://orkoien.com/userfiles/files/40133506205.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613dc2f6c8edf---pejetamipe.pdfIn PDF document text
    • https://clinicamanila.com/ckfinder/userfiles/files/99791197535.pdfIn PDF document text
    • https://ximatinhdongnai.com/app/webroot/files/images/pages/files/kasimeragujekuwogopiwum.pdfIn PDF document text
    • https://bleikss.com/userfiles/file/99434704798.pdfIn PDF document text
    • http://parfumerieindex.nl/images/uploads/wegerifibefeb.pdfIn PDF document text
    • https://www.auto-ecole-rive-droite.fr/ckfinder/userfiles/files/tatajofulubuvurivevabese.pdfIn PDF document text
    • http://babijie.com/upload_fck/file/2021-9-16/20210916040306744664.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=incredible+hulk+apk+download+for+androidPDF 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_off0000b881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB881 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD098 10820 bytes
SHA-256: c5f2d147c605b80fd97c0dd337505ee5ef00d4e0c43265c55429cef40218784e
font_02_sfnt_off0000e93c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93C 15820 bytes
SHA-256: 0805eb078fd0d9bc8d79473881769370b05d9a37c569318ad08b46d8f0ca25c6