Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a2702faa49f375d…

MALICIOUS

PDF

83.8 KB Created: 2021-06-25 16:24:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5e8e8797241239e07e6350d336c26806 SHA-1: 44f80c4eaf978d81ccc938f8999734c19b3985c6 SHA-256: 7a2702faa49f375de2ebd7167253f343f99af1c09439af71768ef593eb1a8a0f
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of multiple compromised CMS upload links indicates a pattern of leveraging vulnerable websites for distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160702e9e6e748---vagawidumufelugaladebin.pdf
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/f3cff9866b9113f51fa6a41e4fba90aa/35524913335.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/jto3ak3i1c8qkalof8vjrd5du1/tejoganuxajafonusikoxukod.pdf
    • https://art-eria.pl/mandarynka/pliki/files/femisomabugeguxon.pdf
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608463655e465---93793649516.pdf
    • http://drthchowdary.net/userfiles/file/45012698752.pdf
    • http://petukmahaaaraj.com/userfiles/file/jufukozafenubufurosamalu.pdf
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/b4b291bc80e061e349d2dc252db74801/rugobazawugewojuxageweki.pdf
    • http://aivieksteslaivas.lv/userfiles/file/tedifadesegelijizodofokom.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/16077645d0a5ef---46174422735.pdf
    • https://glycocalyx.nl/userfiles/image/file/satuzetotojevuviwagaja.pdf
    • http://www.alex-vasilkov.ru/images/wisdom/file/xabezititegomujaxud.pdf
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160846b3a9bdf0---67323552992.pdf
    • https://cafesca.net/ckfinder/userfiles/files/77528750586.pdf
    • https://dadrarad.ro/userfiles/file/fasibavovojarojikigarim.pdf
    • http://jikaramen.com/uploads/files/foledagat.pdf
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/16094b9b27077d---fatosilomolujutu.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607769e9c9be0---80522076738.pdf
    • http://lorichphoto.com/pictures/file/99521959579.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=life+without+laughter+quotes
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e70e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE70E 16792 bytes
font_01_sfnt_off0000ff25.bin
fd1768b3c1e190d9da882a70b5dadce491cdc90a7c50b0065e6aafdb42bfede1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF25 10676 bytes
font_02_sfnt_off0001177f.bin
770aa7cbce691e2008966a3b5d6e18fa13055cf17c4fdda6c81dd8e6d6be5106
pdf-font-stream PDF embedded font (sfnt) at offset 0x1177F 16732 bytes