Malicious PDF — malware analysis report

Static analysis result for SHA-256 47743b94bfc19780…

MALICIOUS

PDF

74.2 KB Created: 2021-09-19 00:50:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 93d76b349fa9522f5425b2bab8370950 SHA-1: e34c9a55d4687bbeb476f0984a3c18857c001820 SHA-256: 47743b94bfc1978062ff133e7cf7a7cd4d1d39e68ead909dc750033d2e497d62
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 contains numerous links pointing to potentially disposable domains, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the nature of the PDF and its embedded links strongly suggest it is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://etyekilovarda.hu/userfiles/file/movonigebisobijidoruta.pdf In PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145995f94e68---44804108783.pdfIn PDF document text
    • http://worldsocialistpartyindia.org/ckfinder/userfiles/files/1996936443.pdfIn PDF document text
    • http://myblindz.com/fck_user_files/file/lorabowativenibo.pdfIn PDF document text
    • https://tselectromechanical.com/uploads/CKfiles/files/bogonibunavasaworawi.pdfIn PDF document text
    • http://immobilier-valence-agen.com/userfiles/file/88569862838.pdfIn PDF document text
    • http://www.prodomasa.com/ckfinder/userfiles/files/96129035327.pdfIn PDF document text
    • https://globalathena.com/ckfinder/userfiles/files/52215738455.pdfIn PDF document text
    • http://doggystylzgrooming.com/admin/photos/file/89409408617.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/nirelalexafefinetewufa.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/37313324206.pdfIn PDF document text
    • https://giriconsultancy.com/content_files/files/22536173004.pdfIn PDF document text
    • https://www.pension-chevaux-haras-gabereau.fr/ckfinder/userfiles/files/woseromubade.pdfIn PDF document text
    • http://bright-inter.com/file_media/file_image/file/wowezikupidobumav.pdfIn PDF document text
    • http://centromp.it/userfiles/files/gubub.pdfIn PDF document text
    • http://cuiquji.net/d/files/52202824361.pdfIn PDF document text
    • http://frchem.cn/upload/files/91749679475.pdfIn PDF document text
    • https://yodobashi-church.com/31434035246.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/80645456300.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/wubaxigut.pdfIn PDF document text
    • https://agape4u.org/userfiles/file/nonenipetivuzutu.pdfIn PDF document text
    • http://mastrodibaglio.it/userfiles/files/90019438564.pdfIn PDF document text
    • http://quiltingacademy.com/fckeditor/userfiles/file/jovosamikinak.pdfIn PDF document text
    • https://gbagencement.fr/uploads/file/tozokezolifekawolafe.pdfIn PDF document text
    • http://gtshotel.it/images/file/dalilezigidixojawusug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=develop+first+app+in+android+studioPDF 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_off0000bf22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF22 16940 bytes
SHA-256: 33fdde13136b6987a41497c6e635c3de37e6bc348b5af72896de78f3db0c9c0e
font_01_sfnt_off0000eabb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABB 10656 bytes
SHA-256: d4d3f3f84f89cd38d3f8eb8aebbc2f215c136fcc1fde1ea74a278265d249caea
font_02_sfnt_off00010345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10345 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1