Malicious PDF — malware analysis report

Static analysis result for SHA-256 562dc09f9cc9b930…

MALICIOUS

PDF

82.3 KB Created: 2021-08-20 10:07:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ffdbaf075bf6ee7ba0d1f8fe45b9cb64 SHA-1: c8fc3f0642058e41e4661a045b18c496c5796efd SHA-256: 562dc09f9cc9b93023884c43eed79999bf6754d9b1a66a1c7c31cfacc1e7ba6a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077cfc09d87e---roginopozafupofupivejajok.pdf In PDF document text
    • http://ok-poland.com/userfiles/file/kokanezorerus.pdfIn PDF document text
    • https://groupunsur3.com/contents/files/47712853327.pdfIn PDF document text
    • http://hkwwta.org/userfiles/85399141894.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/nnsvh4kvvs472tifvebeocsln6/25746883072.pdfIn PDF document text
    • http://sinoorchids.com/image/file/88270406203.pdfIn PDF document text
    • http://lovelyspa.net/ckfinder/userfiles/files/milesogoxukufafilasumezo.pdfIn PDF document text
    • http://eldorautomaticgates.com/UserFiles/file/bowavogosulebeg.pdfIn PDF document text
    • http://sjhrz.com/images/upload/File/febazopajevogi.pdfIn PDF document text
    • http://expresskaliski.info/file/37558531403.pdfIn PDF document text
    • http://potlista.com/file/files/pumazuxufudizowodejebe.pdfIn PDF document text
    • http://thaisomboonautopart.com/userfiles/files/xesuzipali.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/cae99a1c4f9e1e640810892c1d6a5ef1/35652975012.pdfIn PDF document text
    • http://dajuicebarus.com/uploads/files/wimebazazogekopoxonareni.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b8685f0ceb2---jegorikomox.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/a0a6586ca871c81a2d99d4ea0b7b65f7/20045935474.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/35756046887.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084448eb751b---33220204789.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/020b08e759847804677af89469176745/62218240842.pdfIn PDF document text
    • http://1parareunion-club.com/clients/4/48/482fc251494624b09083a87f212a12d7/File/71605433063.pdfIn PDF document text
    • http://rld-carbon.ru/file/vigisorowugop.pdfIn PDF document text
    • http://maxtarget.by/ckfinder/userfiles/files/gibixixofatarogitami.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=clickteam+fusion+2.5+free+full+versionPDF 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_off0000dcef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEF 16772 bytes
SHA-256: bed9010bb27cd9374717f036119ac28243d2b593e1f012b42ea5fc3887aada07
font_01_sfnt_off000108b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120CF 11104 bytes
SHA-256: fc0d10f77df999c50094a80d423fa71f2ecb09a3fa242ba77dfb61fd0e739694

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