Malicious PDF — malware analysis report

Static analysis result for SHA-256 fceb6c00c11728a8…

MALICIOUS

PDF

83.8 KB Created: 2021-09-16 08:45:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 03cbc0b17f8b923648a39ec86b91d751 SHA-1: bb46746c92f4d2a6f296104d188630234e435298 SHA-256: fceb6c00c11728a8a5072baaf19dcff6611790e584aab0ad0b5233b957902c24
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which are hosted on disposable domains or compromised CMS upload directories, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing or malware delivery campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://podimercrm.com/img/files/67289753450.pdf In PDF document text
    • https://libertyrealestate.in/ckfinder/userfiles/files/vuzowanivolenalabip.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613af379b8c6f---971684655.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/20473638699.pdfIn PDF document text
    • http://staresecurity.com/userfiles/file/38837690794.pdfIn PDF document text
    • http://bsp-oblspl.org/ckfinder/userfiles/files/suxunesovaxokuvigunaded.pdfIn PDF document text
    • http://parfumerieindex.nl/images/uploads/45580054972.pdfIn PDF document text
    • https://shastriratanchatterjee.com/ckfinder/userfiles/files/gunamojos.pdfIn PDF document text
    • http://manpukulivermore.com/uploads/files/60186351640.pdfIn PDF document text
    • http://jcnjl.com/userfiles/files/76435670596.pdfIn PDF document text
    • http://panyuchen.com/ckfinder/userfiles/site_eachfun_com/files/26259734301.pdfIn PDF document text
    • http://thegioituigiay.net/uploads/files/gibawil.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/42740347525.pdfIn PDF document text
    • https://hoangvan.vn/wp-content/uploads/files/defalolekizejoweko.pdfIn PDF document text
    • https://saikekanglun.com/filespath/files/20210907191310.pdfIn PDF document text
    • http://binhchuachay.info/Images_upload/files/susagif.pdfIn PDF document text
    • http://janaturismointegrato.com/uploads/file/linom.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/161355e922c6ce---81309492007.pdfIn PDF document text
    • http://xy-interior.com/uploads/files/202109141614312365.pdfIn PDF document text
    • https://myphambambi.com/webroot/img/files/mibamasovof.pdfIn PDF document text
    • http://kodemari.info/data/files/40765019665.pdfIn PDF document text
    • http://mvpbuilding.com/userfiles/file/jerakosebokufo.pdfIn PDF document text
    • http://railwaysrailroads.com/upload_files/files/novewawojanoporo.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cd7fd4b23d---manezegaxufap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=go+multiple+2017+apk+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5F2 16148 bytes
SHA-256: b17e3c388ca520c70044df51a505a8c8de3d1ca9b2e495c629779bc8d31aca59
font_01_sfnt_off0000db81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB81 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF393 19812 bytes
SHA-256: 1338943b297dfb5de014d4b8bff1f2d91507dd599be8cfdc012ed3cbfa2be488
font_03_sfnt_off000127e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127E0 10948 bytes
SHA-256: 1086741f27bba9f0756c5654c9eb49f2581c832d90c10c66c734277bcbf61254