Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca3ef6ea5fac75a5…

MALICIOUS

PDF

69.6 KB Created: 2021-10-18 06:46:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: c77ea11c47974017cfc9913f61e8fb4d SHA-1: 6220a6cce2d078c81c66bff2c68183095fea2f4b SHA-256: ca3ef6ea5fac75a5ce93ecd94b3b2c66c492ac611108eeadf509e55ef141b9e1
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by a machine learning classifier and ClamAV as malicious. Heuristics indicate it functions as a link farm, with many URLs pointing to potentially compromised or disposable hosting. The 'SE_CALLBACK_LURE' heuristic specifically suggests the document's content is designed to trick users into calling a phone number, likely for a scam. While no scripts were directly extracted, the presence of embedded URLs and the nature of the heuristics strongly suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.
  • 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.
  • 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://mimpi1pusat.com/contents/files/fugoz.pdf In PDF document text
    • https://hotelcorona.ro/files/pifazixopemewujopa.pdfIn PDF document text
    • http://upservice.expert/admin/ckfinder/userfiles/files/43839461262.pdfIn PDF document text
    • https://nurdagihaber.com/resimler/files/pivokisibe.pdfIn PDF document text
    • http://parfumland.sk/upl/kaxixijaw.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/96711777527.pdfIn PDF document text
    • http://strojsteel.cz/webpagebuilder/ckfinder/userfiles/files/13450425728.pdfIn PDF document text
    • http://byecook.com/ckupload/files/87172494560.pdfIn PDF document text
    • http://sjzhtchem.com/upload/files/99653857615.pdfIn PDF document text
    • http://salman-is.com/userfiles/file/92093907509.pdfIn PDF document text
    • https://colakcivi.com/userfiles/file/gujixo.pdfIn PDF document text
    • http://losmarinoslanzarote.com/marinarubicon/admin/file/pemuwosogiwazudedoromok.pdfIn PDF document text
    • https://dycmc.com/DATA/upload/files/202109050207301366.pdfIn PDF document text
    • http://kccmaul.com/files/files/36254597442.pdfIn PDF document text
    • http://ciarajewellery.com/editor_upload/file/98933196426.pdfIn PDF document text
    • https://ww170002.linebot.net/upfile/files/20210926000440.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614c3cf9e447e---gujimavelad.pdfIn PDF document text
    • http://opgzvh.hr/upload/file/9202980165.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/d70f4944a0e93613d91d3b3f6e5878ef/89764761005.pdfIn PDF document text
    • http://heatexchangersolution.com/upload_fck/file/2021-9-6/20210906135830556342.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1614518d664bb7---90964611679.pdfIn PDF document text
    • http://vincentianssjp.com/userfiles/file/bivabubekefizenofimosural.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/7752944000.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/5bhJmFgkeCE/uplcv?utm_term=bootstrap+listing+template+freePDF link annotation
    • http://zs.tom.ru/jsplugins/ckfinder/userfiles/files/tofuvuvevanan.pdfIn PDF document text
    • 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_off0000b277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB277 14860 bytes
SHA-256: f931f6107429ad0eaf8ad2c9e6f473d7aafaeba7dce0d42bc5317a67c6c6c847
font_01_sfnt_off0000d7a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A6 10756 bytes
SHA-256: 5ae4d0a86031def35a9be96511c5fc81678ec9cf25dcf6e4230cf67a4a20c87a
font_02_sfnt_off0000f065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF065 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.