Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e97b100255c5f29…

MALICIOUS

PDF

84.5 KB Created: 2021-09-16 22:13:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 05ab9f2012ba77aba3e91f252136d394 SHA-1: 1d23ca4587f072601f8516a29d7d2bc92d4569f6 SHA-256: 1e97b100255c5f292b0d55aa5b8e429e3a31fa00eee35947f3522f4415978cb7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for distributing further payloads or conducting phishing campaigns. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://coretry.ru/uplcv?utm_term=game+rom+ppsspp
    • https://mldom.xyz/web/img/podborky/files/xumenubowejifijined.pdf
    • https://ichapps.com/ichapps/ckeditor-ckfinder-integration/uploads/files/55992242916.pdf
    • https://mn-lawfirm.com/box/userfiles/file/jitibisu.pdf
    • https://directorvincentchow.com/fck_filemanager_upload/file/78459856440.pdf
    • http://hasomedia.com/userfiles/file/57960927918.pdf
    • https://e-tta.com/app/webroot/userfiles/files/93759213552.pdf
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16136cd98c642d---1993137703.pdf
    • http://studio70.eu/userfiles/files/tepujitiv.pdf
    • https://neksav.com/upload/ckfinder/files/96986684555.pdf
    • http://yasairamenbar.com/uploads/files/lupakedisotelijamim.pdf
    • http://studioarchoggianiepartners.it/userfiles/files/pekejawanejo.pdf
    • http://boilerservis.ru/uploads/files/24302895943.pdf
    • http://teleinwestor.com/userfiles/file/pimujenedemoxojigujizod.pdf
    • http://auburn-properties.com/userfiles/files/paguvejavubeliponorojibi.pdf
    • https://flardochform.se/userfiles/file/94145879347.pdf
    • http://studiobaliva.eu/userfiles/files/39810077576.pdf
    • https://tsafar.ir/basefile/tsafarir/files/31350464802.pdf
    • https://parvazyab.com/basefile/api203/files/tifuwonoje.pdf
    • http://zhengfutz.com/v15/Upload/file/20219152255474148.pdf
    • http://chrisnoblelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/figugi.pdf
    • http://www.saletime.gr/admin/fckfiles/file/susexalobi.pdf
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/a1ef41326c91a0a65f3c2a1868b63bdc/girusopopafawo.pdf
    • http://budaors.varosom.hu/userfiles/files/59292691087.pdf
    • http://wang023spa.com/userfiles/202109file/2021091521361970554.pdf
    • http://alvit-bk.ru/userfiles/file/19831604892.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5da.bin
4b4a9e87a0350fce1a461df3f97afc212985ccca22945173512f4b49ca72520a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DA 18660 bytes
font_01_sfnt_off0001160a.bin
14563f60e3b1163cd4a40b6845cbec1bc7ccd2e81c696d6d94d32f5d4adb58c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1160A 10112 bytes
font_02_sfnt_off00012c99.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C99 16792 bytes

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