Malicious PDF — malware analysis report

Static analysis result for SHA-256 a401b8452ee358e8…

MALICIOUS

PDF

80.5 KB Created: 2021-09-11 13:35:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 857d9aa411607582bd7a6208f74e6b1b SHA-1: 3818c0c2ab0fb329f16575dd6012979738b4c871 SHA-256: a401b8452ee358e8531168d264db9a8b15f93bfea463668a89c28d0a5c12dead
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting a phishing or malware distribution lure. The PDF structure and embedded URLs point towards an attempt to redirect users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://drafthe.ru/uplcv?utm_term=fur+elise+piano+music+sheet+pdf PDF link annotation
    • http://sherwoodchambergolf.org/ckfinder/userfiles/files/kemumeroxesepuxus.pdfIn PDF document text
    • http://resetimpianti.it/reset/public/file/30562328942.pdfIn PDF document text
    • http://iproperty.ae/userfiles/file/zilezuvujegus.pdfIn PDF document text
    • http://avalon-essenzen.at/userfiles/file/84638454389.pdfIn PDF document text
    • http://thesciencenetwork.org/uploads/files/kusupibexaxazovejili.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/913c4ef871f4b2c195fd72502e463976/wiwil.pdfIn PDF document text
    • http://tv-sat.cz/userfiles/file/kijewogulum.pdfIn PDF document text
    • https://juhaszautovill.hu/userfiles/file/28180138546.pdfIn PDF document text
    • https://liur-krd.ru/userfiles/file/54190686632.pdfIn PDF document text
    • http://sungwoneng.com/upfile_editor/2021/files/23545800366.pdfIn PDF document text
    • http://autodilykanka.cz/cmsimple/images/file/83800228785.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613bbd12034ee---rabopaluranukogitopagafa.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/robixitaju.pdfIn PDF document text
    • https://divinenine.net/userfiles/file/lewanimawozulefusoz.pdfIn PDF document text
    • http://golfvillageonline.com/userfiles/file/pewiselafejerinazijirok.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/gagomigubilarewazebeko.pdfIn PDF document text
    • https://cuatudongbinhduong.net/uploads/files/xalewotezowuzopupilekowe.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/16133837076.pdfIn PDF document text
    • http://meimagedance.tw/ufiles/files/81626526126.pdfIn PDF document text
    • http://abwhopewell.com/uploads/files/jevikakarabagefipezusas.pdfIn PDF document text
    • http://koala-al.com/d/files/fitadejafifosukitosol.pdfIn PDF document text
    • https://camelcarpet.org/d/files/pejenofojelekilokimuwijid.pdfIn PDF document text
    • http://abdon.madteam.net/ckfinder/userfiles/files/pigefurak.pdfIn PDF document text
    • http://milkexim.ru/imgeditor/file/mixozowapo.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_off0000ccfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCFB 20132 bytes
SHA-256: af6333eee2d6f0760ca307336c6d03a4046c774ee1431c432c510efb6e26b059
font_01_sfnt_off000101e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E1 10960 bytes
SHA-256: a310c884edbf84b39f8cb5dbb26d667a3ac11281cdc7aee4df22ae7d2f2f9979
font_02_sfnt_off00011b14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.