Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd5ded06bf8c24d2…

MALICIOUS

PDF

77.7 KB Created: 2021-09-11 22:33:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 30e58c654e5ee84d6b397bdde6d0c435 SHA-1: bdec2785ea0e8553d105e8ff1afdf59b32e09142 SHA-256: dd5ded06bf8c24d2fd2f795bda4e62e01312c1fccb633f9070315a3d9d6aeda0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed to host numerous links on disposable domains, a common tactic for distributing malware or conducting phishing campaigns. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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://ingegneriarossi.it/userfiles/files/dakarafudejabimozif.pdf In PDF document text
    • http://lagrupacio.cat/file/jubuwudofaxewirudajed.pdfIn PDF document text
    • https://yam-token.com/business_school/uploads/file/gapokadidoxamod.pdfIn PDF document text
    • http://uniradioweb.info/userfiles/file/sabotemad.pdfIn PDF document text
    • https://mbbs.hr/files/zejugojaxoderazurafe.pdfIn PDF document text
    • http://fsanaq.com/upload/file/210901220926949502styvoi979gy6.pdfIn PDF document text
    • https://www.db-ynox.fr/ckfinder/userfiles/files/73669519565.pdfIn PDF document text
    • https://sportuna.be/ckfinder/userfiles/files/80451923363.pdfIn PDF document text
    • https://underworldgear.com/admin/images/fckImg/file/waranano.pdfIn PDF document text
    • https://mttrasportisrl.it/dati/upload/file/9789106243.pdfIn PDF document text
    • https://www.hkfew.org.hk/ckfinder/userfiles/files/97845967464.pdfIn PDF document text
    • https://kcss.hu/korosi/userfiles/file/goxanun.pdfIn PDF document text
    • http://ykzn8.com/upfiles/editor/files/lavoko.pdfIn PDF document text
    • http://investgeorgia.ge/userfiles/file/logowunejulewu.pdfIn PDF document text
    • https://gimenezricarte-deltabogados.com/ckfinder/userfiles/files/18837156571.pdfIn PDF document text
    • http://kramnyca.info/img/upload/editor/file/neximi.pdfIn PDF document text
    • http://luckysim.com/userfiles/file/31443488901.pdfIn PDF document text
    • https://moiatakashta.com/userfiles/file/puwododuliw.pdfIn PDF document text
    • http://timebymtm.com/upload/files/88892274787.pdfIn PDF document text
    • http://bixenony.com/userfiles/files/pefatitosot.pdfIn PDF document text
    • http://mariautonoleggiomarsala.it/userfiles/files/35261557894.pdfIn PDF document text
    • https://tonymusic.se/UserFiles/files/simugodovipub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=naruto+shippuden+ep+382PDF 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_off0000c728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC728 11020 bytes
SHA-256: 006d84009d9d21c689b8a99c9c5fef4582ca9ee52cc92ed2ad16c8540a70932a
font_01_sfnt_off0000e0ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CE 18084 bytes
SHA-256: 2eeb64c088f2ff6bfce14f20957bea1e49fb6c1999ba3a223d8d870a08b47d32
font_02_sfnt_off00010fe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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