Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6afe4532190c9e5…

MALICIOUS

PDF

70.4 KB Created: 2021-10-02 20:50:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 9622255be7132acb82b43bf511d49806 SHA-1: 3c212edda47a64b12e5e1d9ef63735c877b8172c SHA-256: e6afe4532190c9e5e31e6b31d76504cbb412a9e105e254683400422e0c7a1480
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier with high confidence. It contains numerous embedded URLs pointing to various domains, suggesting a phishing or malware distribution campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a large number of links on disposable hosting, further supporting the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://coretry.ru/uplcv?utm_term=india+monsoon+months PDF link annotation
    • https://cliniquemyo.com/userfiles/file/totidonagufepojiz.pdfIn PDF document text
    • https://ita.kru.ac.th/ckfinder/userfiles/files/40750136546.pdfIn PDF document text
    • http://gearonlaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/54482609674.pdfIn PDF document text
    • https://moscreen.in/cmsfiles/file/62493826858.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/85185801355.pdfIn PDF document text
    • http://realtor-madrid.com/uploades/fckeditorfile/76282365512.pdfIn PDF document text
    • http://applexin.com/ttpsea/files/file/79002116746.pdfIn PDF document text
    • http://pandoraecza.com/genelresimler/file/83590821173.pdfIn PDF document text
    • http://tearose-kitchen.com/sites/default/files/images/imcefile/gunexuwadax.pdfIn PDF document text
    • https://g4m3s-4p1-12s1.com/contents/files/jazevopazaxugutatogi.pdfIn PDF document text
    • http://studiodebiaggi.eu/userfiles/files/sofufapajepigegenogusom.pdfIn PDF document text
    • http://www.xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/92810745380.pdfIn PDF document text
    • http://hiro-seiko.com/upload/files/kuleziwijekujakapemisorod.pdfIn PDF document text
    • http://fatimaartwork.com/userfiles/file/gememano.pdfIn PDF document text
    • http://sostrevalli.it/userfiles/files/zupikefo.pdfIn PDF document text
    • https://history.tlshaa.org.tw/ckfinder/userfiles/files/gisuzof.pdfIn PDF document text
    • http://eiak.org/upload/editor/files/13963463647.pdfIn PDF document text
    • https://mar3ol.com/Files/files/41422061164.pdfIn PDF document text
    • http://www.schule.havonix.com/ckfinder/userfiles/files/pugemolo.pdfIn PDF document text
    • https://phuketwebstudio.com/ckfinder/userfiles/files/watuxezajovazogaga.pdfIn PDF document text
    • http://ngocminhcnc.com/demo_thietbimay_24_7/upload/files/gebalapewifegofovodebi.pdfIn PDF document text
    • http://stonestudio.pl/files/upload/file/tulaki.pdfIn PDF document text
    • https://tpk-m.ru/files/file/19688584566.pdfIn PDF document text
    • https://lolakarimova.uz/ckfinder/userfiles/files/95778091826.pdfIn PDF document text
    • http://greenhousehotel.vn/uploads/image/files/47287473004.pdfIn PDF document text
    • 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_off0000b410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB410 10188 bytes
SHA-256: e715657d9842e8243715e77c1f30261a3b0f4fb018c1857e464199adf5095f7a
font_01_sfnt_off0000ca9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA9C 16040 bytes
SHA-256: 85d7f7b1d7ffe0d62f20ac981f5a6f524864cd93b2d3c755d336502abf9afd98
font_02_sfnt_off0000f3f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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