Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a235a61155fd324…

MALICIOUS

PDF

129.1 KB Created: 2021-08-13 11:55:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0fd02c0322670343674b68d3d501822e SHA-1: f695d5cebc1d608224e31fb1d08d3586170ba136 SHA-256: 0a235a61155fd324a66b6f1cc344b97191fe30ffa5e15e753483c7de2a4f9154
196 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam. It contains numerous links, many pointing to disposable hosting or compromised CMS upload directories, suggesting an attempt to distribute fraudulent content. The document body is heavily obfuscated and unreadable, but the heuristics strongly indicate a phishing or scam lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9939

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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 http://atthaya.com/file_media/file_image/file/ponekerujovumo.pdf
    • http://dollreunion2020.com/clients/4/43/4392dc7a9e9236654a628da0af121bbb/File/5948190673.pdf
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f4ee50b44---ganasu.pdf
    • https://repare-ton-smartphone.com/userfiles/file/vimirozobajejulagez.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb8efe9672---jokirag.pdf
    • http://closehorses.com/userfiles/file/zijezuvariwilijiro.pdf
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/vugifisuji.pdf
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/971f83ef844a233daff304397ab4d1ed/27297877905.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b753191cb---xevibezowob.pdf
    • http://daoltrading.com/userData/board/file/jenekila.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/7vv3u50itq04nfk7m1coiaanj6/zofimesuf.pdf
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/miwenoparivido.pdf
    • http://www.masozilina.sk/ckfinder/userfiles/files/93049015473.pdf
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/096jhcb8grniivrdm8mgnhq40t/sonorajikaxopez.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae98df62394---36673303842.pdf
    • http://ckpak.com/fckeditor/userfiles/file/34971854338.pdf
    • http://sunwisechem.com/Uploadfiles/files/70050305347.pdf
    • http://bigband-ulm.de/userfiles/files/88209402583.pdf
    • https://webbsoil.com/home/webb/public_html/ckfinder/userfiles/files/libatijuwekadopa.pdf
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/0718bd0296073e96812f8f3d0977dc9a/37485671336.pdf
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/7a43737090c4d9b323010b58e447f11c/jaligikovitevez.pdf
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160705c9e83801---rifesoma.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1db3e0332a---6860266749.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16091a3ed9dc3f---10352750562.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/200feb60be6247d3df92fa647cef1b34/2737218551.pdf
    • http://davis-wilford.com/clients/5/5d/5d1655677b271656441dfc21bb295863/File/15902074779.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=how+to+thread+a+bobbin+on+a+singer+301a
    • 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_off00019595.bin
79a1b734e614770743cfa121e5101f820c1afab7f241e47c1774b17fa11d04e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x19595 17760 bytes
font_01_sfnt_off0001c46f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1C46F 16792 bytes
font_02_sfnt_off0001dc86.bin
5c8d0bd259d31472f86b1732689209312421a938be464bdb2e4c8d0dd090f309
pdf-font-stream PDF embedded font (sfnt) at offset 0x1DC86 11044 bytes