Malicious PDF — malware analysis report

Static analysis result for SHA-256 f347a299b2ce897d…

MALICIOUS

PDF

121.6 KB Created: 2021-06-21 01:13:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2c7680880f18cd644717fc0bf6efddfd SHA-1: 94e52e79308a1de248b307c86adcb3eb8a79f902 SHA-256: f347a299b2ce897d3e1c90db51cc234da8a3c511556b4e7683c67ba4a844d938
164 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links to compromised websites, suggesting it is part of a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/9a799c90d57caa38a1845e9960fb91e0/14820613483.pdf In PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160820cbc84b98---vugonubixadevew.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608460b6088cc---13748019025.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ccdad9a9b5---76324349704.pdfIn PDF document text
    • https://iringmalaysia.com/ckfinder/userfiles/files/lixaxakifobezabavutomom.pdfIn PDF document text
    • http://luberoff.com/userfiles/file/38510569940.pdfIn PDF document text
    • http://falconfam.com/ckfinder/userfiles/files/76539822813.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/91223899114.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d12d74a384---60293594723.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/34374329998.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609049905f0f0---farevodelefogoma.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/d5bc5182c15ee7348aa6868a54101bee/fekusomeji.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/4g9dfdnabcmah86pcmcn05bv6q/16483459953.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16079dd923fbcc---83433399059.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/14408204800.pdfIn PDF document text
    • https://nguyenvanhuongloc.vn/app/webroot/files/images/pages/files/sujorekesafinaxogowajezi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=chak+de+india+full+movie+gomoviesPDF 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://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014d2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D2C 5404 bytes
SHA-256: 97f327ea74ad47872c24cddbe637f8aef47cab73dd2084fcafac844fd8047802
font_01_sfnt_off00015fcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FCC 5252 bytes
SHA-256: cb90dd214ec06afe7a81f27418720a943d99c94fd7ede9ddc539331f65d94343
font_02_sfnt_off0001718c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1718C 4976 bytes
SHA-256: b607dd9bb54b39911031498f71d3435762146e70b2ac776ff79f2789b1d7324d
font_03_sfnt_off00018196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18196 2880 bytes
SHA-256: f17c16773e4e8faf472e2c0c149a7508db454dd54c4b65cd44327924541eba44
font_04_sfnt_off00018e0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E0E 16056 bytes
SHA-256: 7c845f63c0a2d3d3cbd3126b37359e231ae85e5f73b145ff734c6fe601601918
font_05_sfnt_off0001c041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C041 16352 bytes
SHA-256: bad3e77793387e375f0751eee7fc888b4c0b95973bb009cf49b6ce835138b423