Malicious PDF — malware analysis report

Static analysis result for SHA-256 da1f0e53654e9bd1…

MALICIOUS

PDF

71.5 KB Created: 2021-09-16 11:35:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: dee6039f0e513b06e1b41a2a8d63c898 SHA-1: c0b921aba125eaa7c91918f8469162958d016015 SHA-256: da1f0e53654e9bd1d9a4f5926cfc3075f98801a330c2763ac6adcb6942c13965
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://smidgel.ru/uplcv?utm_term=chatroom+in+pakistan PDF link annotation
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/478e5uva8gufdkaqk47golevp6/lagudizuvoxelodimamet.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142a39db307b---telajanu.pdfIn PDF document text
    • http://www.naraihillgolf.com/admin/userfiles/file/pimusutix.pdfIn PDF document text
    • http://muzeumostrowiec.pl/obrazy/file/42973759658.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/27597344612.pdfIn PDF document text
    • http://daiichilogistics.com/uploads/news_file/kufaxiguda.pdfIn PDF document text
    • http://datev.hu/ckfinder/userfiles/files/nunuzesuguxinele.pdfIn PDF document text
    • http://wxdyzs.com/userfiles/files/belixizofipexug.pdfIn PDF document text
    • http://riccaassociati.eu/userfiles/files/xabesonit.pdfIn PDF document text
    • http://standardamulet.com/files/files/firuwejegap.pdfIn PDF document text
    • http://gocchame.vn/app/webroot/img/uploads/files/leweteluzabenekebisureleb.pdfIn PDF document text
    • http://envigest.cz/upload/file/88498914456.pdfIn PDF document text
    • https://akvanova.ru/sites/default/files/70680560816.pdfIn PDF document text
    • http://jinruily.com/UploadFile/file/20210904221304546.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/71f3b5b3eabe9ff237e6e90c1dad5f49/10177871074.pdfIn PDF document text
    • http://uralteplostroy.ru/content/file/bejuze.pdfIn PDF document text
    • http://poddertradingandindustries.com/userfiles/file/98571648214.pdfIn PDF document text
    • http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/gafipixodarubu.pdfIn PDF document text
    • http://www.yemany.com/yemfiles/files/35589423335.pdfIn PDF document text
    • https://illustrations.noche.fr/images/files/42557042181.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/k5mr5s17kv64i0ul92q3boc1hf/19094144827.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/d78e90bafe4f3e5c7b2a612e46cdcf38/semudub.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c1c4b8d6cb---tokebevepukuburafof.pdfIn PDF document text
    • https://cuatudongsaigon.vn/uploads/files/juzonofotulepesegeduvejid.pdfIn PDF document text
    • http://hoteldazegliotorino.com/userfiles/files/pavije.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_off0000b9c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d1e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E0 10464 bytes
SHA-256: e92f04bc5dd6e016642a381fa37a808acd06e28a05486039f41382e289e51326
font_02_sfnt_off0000e972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE972 15380 bytes
SHA-256: 264a262a3866e11086ca383fbf257a59a92b7f966eeeb644736bf9e245f7dd20

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