Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ed54468e86ca870…

MALICIOUS

PDF

87.0 KB Created: 2021-08-30 04:11:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 4ba1df4c37653a31fdecd24814ac6fb1 SHA-1: 4505bf6a8c6c2d5827733af248ed979ed7880a8d SHA-256: 2ed54468e86ca8708284be26f03269fe4a1b58ae3ad263c6d68dfa92d5a6786c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised websites, suggesting an attempt to distribute malicious files. The presence of a 'Download Now' lure further supports this. While no scripts were directly extracted, the PDF structure and numerous external links indicate a phishing or malware distribution attempt, consistent with the ClamAV detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://kiuruvedenlukio.fi/tiedostot/file/fubadetexuwibimi.pdf In PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/gdh9sj5moo9ou2l69ihs2gdrc8/41876989038.pdfIn PDF document text
    • http://ticaproduce.com/ckfinder/userfiles/files/wavedorinudowirexed.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16089bd1721b22---36926518948.pdfIn PDF document text
    • http://veiligheidssloten.nl/ckfinder/userfiles/files/lemanagifuvo.pdfIn PDF document text
    • http://baliretreatcenter.com/olabali_ci/media/images/newsfiles/8794449232.pdfIn PDF document text
    • http://trimblehighalumni.com/clients/84492/File/kulirejetododifokeg.pdfIn PDF document text
    • http://skikk.nl/app/webroot/files/userfiles/files/63570088141.pdfIn PDF document text
    • http://fusheng-vietnam.vn/admin/webroot/upload/image/files/gekunagumogemav.pdfIn PDF document text
    • https://digireg.ch/upload/sinapebimewo.pdfIn PDF document text
    • https://www.ftha.org/admin/ckfinder/userfiles/files/norob.pdfIn PDF document text
    • http://inannamsao.com/uploads/files/99930032477.pdfIn PDF document text
    • http://daycamhoa.net/upload/UploadFiles/files/xitokarazataboxexaneze.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608561e96852d---96360269288.pdfIn PDF document text
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/a3ou2ds2qmp681coj71k5aclv1/fojakozixuzodobomi.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/584323c3a1a66287c37ee1634d5d44e6/nejuvafumufekuro.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfb578ec1d---37698252742.pdfIn PDF document text
    • http://alltechsro.cz/files/falepedik.pdfIn PDF document text
    • https://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/1e191303d648cca95e878d00c6adf9c9/57383463328.pdfIn PDF document text
    • http://riph.pl/userfiles/file/86411705063.pdfIn PDF document text
    • http://phatnang.com/media/ftp/file/lemezil.pdfIn PDF document text
    • http://piotrkowska77.pl/zdjeciafile/kumofavutaxutotefusuw.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/8c5ce49cda3a6a7c42c90308fdc8de67/71541644347.pdfIn PDF document text
    • https://gberwanda.com/gbe/useruploads/blogs/files/vatomodinavamu.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/c4011914093d647e5ad958e01a5a08ff/savojomatinizomev.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/6cfadf78f839c8a0af3c4f5a7a774d55/30232894435.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=iso+god+of+war+2+ppssppPDF 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_off0000efb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB1 17688 bytes
SHA-256: bb3801579b0c9a66dc429788a3ac8b02a0cb811ed5e5313752a38168a508cffc
font_01_sfnt_off00011dd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000135ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135EF 10356 bytes
SHA-256: 4a40a4b56049ba58144c534857a5143e38f79632343b4fbafa727f58239ea074