Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecc25a3cb190e4cc…

MALICIOUS

PDF

68.8 KB Created: 2021-09-09 18:49:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6de7d3496311ded75087e3a55c5d8562 SHA-1: 59302c32e36892348f41251e179883dc212d4244 SHA-256: ecc25a3cb190e4cc1acdbf2282a886187ea676306edf3f9dba0e7196889f7ed6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. It contains numerous embedded URLs pointing to a link farm, suggesting a phishing or credential harvesting attempt. The PDF's structure and embedded content indicate it's designed to redirect users to external, potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://dalnoboy.com/data/filestorage/upload/files/82284196820.pdf In PDF document text
    • http://smartdeal.pl/files/upload/files/45522515055.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/tiribafarixowatiwewebawix.pdfIn PDF document text
    • http://zvaracskaskola.eu/editor_uploads/system/files/bibigulaxorebumokutokeme.pdfIn PDF document text
    • https://vico-immobilien.com/ckfinder/userfiles/files/54536700088.pdfIn PDF document text
    • http://szhlfz.net/upload/49901600630.pdfIn PDF document text
    • https://nhahangbienhaitien.com/uploads/files/87668625502.pdfIn PDF document text
    • https://clickbox.ro/images/file/83358085720.pdfIn PDF document text
    • https://shiokuda2.com/contents/files/48219229892.pdfIn PDF document text
    • http://etre-belle.su/images/file/jobazuviwumixizupubaxer.pdfIn PDF document text
    • http://kedehg.com/ckfinder/userfiles/files/bexavodasitidalugivesabu.pdfIn PDF document text
    • https://phoenixturkey.com/upload/ckfinder/files/gawotaluda.pdfIn PDF document text
    • http://www.cpnatacao.pt/backoffice/ckfinder/userfiles/files/wasixobumizitawede.pdfIn PDF document text
    • https://adium.ru/userfiles/file/69381432151.pdfIn PDF document text
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/91157434216.pdfIn PDF document text
    • http://educasters.co/ckfinder/userfiles/files/88994919035.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/33736714602.pdfIn PDF document text
    • https://www.sherpachristain.org.np/ckfinder/userfiles/files/63363115637.pdfIn PDF document text
    • https://ichibaninfotech.com/ckfinder/userfiles/files/vuduzizonoxevitisuw.pdfIn PDF document text
    • http://cncforginghammer.com/d/files/45207972441.pdfIn PDF document text
    • https://adeptos.clevercloud.pt/images/items/files/17535932238.pdfIn PDF document text
    • https://onthespothousing.com/userfiles/file/69177330854.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/52625b4884c6eb51e746cd95da4f9abf/2750216843.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/toxowomazodenuto.pdfIn PDF document text
    • http://guchen.ru/d/files/pulevuzogox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=smartphone+os+typesPDF 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_off0000b017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB017 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC829 15036 bytes
SHA-256: e62ecd99a43c9b4b97dfc19c4bf18341cb0305555266a887b3224b8c62db1658
font_02_sfnt_off0000ede6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE6 10568 bytes
SHA-256: 1e6e69754a3d1361bf92146cecf30bf40d362d968ceb823da5da04169afd36c7