Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b182a408112f9ea…

MALICIOUS

PDF

82.9 KB Created: 2021-09-05 21:07:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 76185f98a94aca41082927d023f06a95 SHA-1: a654ccb42700dcf8a8c6d63d016ce76eb2776853 SHA-256: 2b182a408112f9ea72e6362c7780fd5a565f79c1a5a040b32c8dfa7b27cc3825
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution scheme. The presence of these links and the overall structure align with spearphishing attempts to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 6

  • 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.
  • 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://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16116d78ec5957---62027000027.pdf In PDF document text
    • http://w-mill.jp/images/file/fowugegegagufavipivifara.pdfIn PDF document text
    • http://ramenzoni.eu/userfiles/files/73037664510.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/l6qtsa4svjkriivjhn3s7nus4k/3245645398.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/58790555843.pdfIn PDF document text
    • https://vietspices.asia/uploads/files/73279480075.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1607767a9845ba---14093917502.pdfIn PDF document text
    • http://stringladies.cz/userfiles/futepibajibagulojudisude.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082477c2217f---ferekomurexujupiw.pdfIn PDF document text
    • http://kor-ra.ru/UserFiles/file/balevuzojetepepofeg.pdfIn PDF document text
    • http://massvt.sk/editor_uploads/system/files/xagujelopalenozoboti.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/97a51ec34f951c251b701bb8c520aff5/53704249501.pdfIn PDF document text
    • https://berettyotv.hu/userfiles/files/rajes.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091f09e9ef34---vupewilogukuvop.pdfIn PDF document text
    • http://consade.com/userfiles/file/40295778961.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b27bf145b4f---zejabosutuvafirirud.pdfIn PDF document text
    • http://www.prakashirrigation.com/uploads/fck/files/82160015776.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/kubiwap.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611ec57b1c96c---wulurujizotafapoxusa.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a26cdd24d24---42003248423.pdfIn PDF document text
    • http://teormech.ru/teormech/usrimg/file/funoxokazuz.pdfIn PDF document text
    • http://epmachine.ru/d/files/zofin.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210718001322.pdfIn PDF document text
    • http://nomorecpapmachine.com/userfiles/files/kofis.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085434ef405a---vuvido.pdfIn PDF document text
    • https://cmoretv.com/userfiles/dopedamagibakeg.pdfIn PDF document text
    • http://bon-mar.com/fck_user_files/file/tinofudelaxuvifegu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=yasin+pdf+downloadPDF 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_off0000e0bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BB 10228 bytes
SHA-256: a1b537ce8cfc1176271907e473a9da3b282835e51737a6cfd43d0a67c3ae7250
font_01_sfnt_off0000f7c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010fda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FDA 17760 bytes
SHA-256: 56cb0fef7b782095a19e3310bad95b43c0ef4422a5ae5154d943d1ea23a0b18c

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