Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1e56eedfdbd05ac…

MALICIOUS

PDF

74.5 KB Created: 2021-09-08 22:33:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 52a3092f68340662fa137b7336a94e7c SHA-1: 3ad52d355cb5b5b6e877dd8d0db09cfd0a882465 SHA-256: a1e56eedfdbd05acb905213063928ba577917fd74db1932543ac7d42796e999d
126 Risk Score

Malware Insights

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

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 disposable hosting, suggesting a tactic to obscure malicious destinations. The embedded URLs, despite some being marked benign, contribute to the overall pattern of directing users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lideparts.com/userfiles/file/1631032192.pdf In PDF document text
    • https://gmnavarra.es/ckeditor/files/57424543194.pdfIn PDF document text
    • http://mdknoodles.co/uploads/files/rovojizizifesibajuroger.pdfIn PDF document text
    • https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/gumolanuduzodebamezes.pdfIn PDF document text
    • https://istanajp.com/contents/files/dowejujazepibaluje.pdfIn PDF document text
    • https://kattliv.com/kattliv/admin/userfiles/file/13907771793.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc57be6e2d---jawawujewufobekaside.pdfIn PDF document text
    • https://gsm.company/ckfinder/userfiles/files/90933699082.pdfIn PDF document text
    • https://laatuwhuisweerstralen.nl/upload/file/44699760268.pdfIn PDF document text
    • http://gamboeng.com/assets/ckfinder/userfiles/files/9348693606.pdfIn PDF document text
    • https://www.clinicaepilepsia.cl/ckfinder/userfiles/files/39946452805.pdfIn PDF document text
    • http://ccsl.asia/files/vutesexezujasixinusiloxu.pdfIn PDF document text
    • https://stauber.lt/images/files/38381459776.pdfIn PDF document text
    • http://ellev.fr/upload/files/nopudaxabapesepedava.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/6shcoos8fsn6sacbevj3dvnuo2/34978056238.pdfIn PDF document text
    • https://gilbertems.com/videos/file/26315118483.pdfIn PDF document text
    • https://panoramamall.bg/ckeditor/ckfinder/userfiles/files/bifafulebanezaxele.pdfIn PDF document text
    • http://clinicaveterinariagoitese.it/userfiles/files/33205585347.pdfIn PDF document text
    • https://asfus.net/virgsurv/userfiles/file/pozogisepokokax.pdfIn PDF document text
    • http://dycelife.com/userfiles/file/fofiz.pdfIn PDF document text
    • http://ensky-chemical.com/upload/files/31435636668.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/59162915991.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=fb+liker+apk+download+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_off0000be8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE8E 10656 bytes
SHA-256: 1ed4ee979b6f977553cc31c0fded54b79965f2aa31836385844bdb1947174281
font_01_sfnt_off0000d6d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE8 18324 bytes
SHA-256: f1d534d750932eabb39c059e7ed0ec879110b79aa6e6d994da382c6b9ca8c19b