Malicious PDF — malware analysis report

Static analysis result for SHA-256 e022895f36a0a4c0…

MALICIOUS

PDF

67.6 KB Created: 2021-10-03 15:59:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: f745f549b62c4d06f28b9da2fd06938d SHA-1: 9327affecc0e625113d6d8508235e253aca7964b SHA-256: e022895f36a0a4c07c2051cded6ae90d9c0280246e61ae9252a950b74f0c2255
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-based lure, typical of phishing attacks, designed to trick users into clicking embedded links. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and numerous embedded URLs suggest it's part of a campaign to redirect users to potentially malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 2 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://syntellect.ru/Repository/file/sefuzobikojogonedek.pdf In PDF document text
    • http://sisparts.pl/zdjecia/fck/file/mobedazu.pdfIn PDF document text
    • http://www.fd.ntou.edu.tw/ckfinder/userfiles/files/34616855508.pdfIn PDF document text
    • http://gourmethousemacau.com/UploadFilesfile///gifopowetimusulusite.pdfIn PDF document text
    • http://nirmalapublicschoolerumely.com/userfiles/file/lilifedaladawilu.pdfIn PDF document text
    • https://evpersoneli.net/ev-personeli/file/subunopepafakugizunuguta.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613408e96c6aa---fubiwipimakezufajiwabileb.pdfIn PDF document text
    • https://cafesca.info/ckfinder/userfiles/files/jovemex.pdfIn PDF document text
    • http://www.cpiequipos.com/assets/images/user_files/files/fuwujekutosopejegagokavil.pdfIn PDF document text
    • http://studiomanzella.com/userfiles/files/zufivuzabija.pdfIn PDF document text
    • http://veganogle.es/uploads/ckfinder/files/40883140318.pdfIn PDF document text
    • https://citytrafik.nu/images/file/99386932982.pdfIn PDF document text
    • http://sipsak.nl/userfiles/file/situzupolifibamisaradapu.pdfIn PDF document text
    • http://spellenindex.nl/images/uploads/42881894568.pdfIn PDF document text
    • https://laughteronlineuniversity.com/images/upload/files/dujoxalobagex.pdfIn PDF document text
    • https://sandipkumardutta.com/ckfinder/userfiles/files/9684570268.pdfIn PDF document text
    • https://bayihoki99.com/contents/files/84349424875.pdfIn PDF document text
    • https://infotechb2blite.com/bot/ckfinder/uf/files/22905864992.pdfIn PDF document text
    • http://hwangtosidae.com/userData/ebizro_board/file/xugaxagivudef.pdfIn PDF document text
    • http://zsdbiopharm.com/upload/files/4134314671.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=sniper+3d+unlimited+coins+and+diamonds+mod+apkPDF 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_off0000aae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAE0 14476 bytes
SHA-256: 82db1b27130d3df705db7a34ad3c7dca38bef699042cf4c57ca56ca0b98963bb
font_01_sfnt_off0000cf24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF24 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e73b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE73B 11112 bytes
SHA-256: 5bf5fa67434c2e9f673638c48ec813156815ea5b0d366565038e0d3e871b8bac

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