Malicious PDF — malware analysis report

Static analysis result for SHA-256 89516a8ceac8a184…

MALICIOUS

PDF

69.3 KB Created: 2021-09-26 18:03:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 49e1b117b67c6a9a45cc9adeb98fb151 SHA-1: 0c032c316fdb004fb4a8cf6141680e20cba76ca6 SHA-256: 89516a8ceac8a18413217221efcde5017a3416fe6ef9e961788c2240f853bc28
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous external URIs, including one identified as a link farm on disposable hosting, suggesting a phishing or malware distribution lure. The PDF structure and embedded content indicate it is designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://drafthe.ru/uplcv?utm_term=call+divert+apk PDF link annotation
    • https://bazk.info/public_htmluploads/file/vebogomumetasenudaluluj.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/buvuvi.pdfIn PDF document text
    • http://clinicaveterinariacene.com/userfiles/files/sosowogalefugojarovogino.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/54256790591.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/1614057f4e07b7---biganasifekali.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/dadakavewowakewasikofepu.pdfIn PDF document text
    • http://metafelix.it/userfiles/files/44910345840.pdfIn PDF document text
    • http://occahomesearch.com/userfiles/files/xigeseturilofemupuxar.pdfIn PDF document text
    • http://3xlove.com/uploadfile/file/fosamabimukam.pdfIn PDF document text
    • http://abw10thstreetne.com/uploads/files/navasox.pdfIn PDF document text
    • https://happycondo.leaddeehub.com/userfiles/files/losemeposolodexipefi.pdfIn PDF document text
    • http://skazka76.ru/pic/userfile/pipafikigove.pdfIn PDF document text
    • https://bokaichenyu.com/upload/files/zawejikusebezena.pdfIn PDF document text
    • https://eirai.org/editor/ckfinder/userfiles/files/lifomizedo.pdfIn PDF document text
    • http://villabrown.it/userfiles/files/96065477192.pdfIn PDF document text
    • https://optimumquestsolutions.com/ckfinder/userfiles/files/dazifidedosepagapafuropek.pdfIn PDF document text
    • http://avrig35.ro/uploads/fck_editor/file/lejitejukejusuw.pdfIn PDF document text
    • https://highlander-inn.com/assets/userfiles/files/51270363734.pdfIn PDF document text
    • http://nationalherbo.com/userfiles/file/61548156165.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/likifaribavam.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/91289643175.pdfIn PDF document text
    • http://kerrya.com/ckfinder/userfiles/files/38836750593.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/tadanedu.pdfIn PDF document text
    • https://rallstarawards.us/nbloom/fckuploads/file/81360748518.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_off0000af2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF2A 10180 bytes
SHA-256: 6349377134f1b98c9496c209be4bdc32ecac86620bce63a97455cec5c83b16bc
font_01_sfnt_off0000c610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC610 16240 bytes
SHA-256: 0604382752f0029dec3fcafa5d17ccfb5c7657a687297ba6e8e9eb88a5f96aee
font_02_sfnt_off0000efc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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