Malicious PDF — malware analysis report

Static analysis result for SHA-256 b32f36f4afbb385d…

MALICIOUS

PDF

82.9 KB Created: 2021-06-27 18:09:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 832b9cc83d3db23d32e28416e7c3dd54 SHA-1: a95c37de6bcf2d1ce6e245bf3eabd7c511fdb4a5 SHA-256: b32f36f4afbb385dc149c6617160def5a6b65acfcc9726983192a87d7eb8a96d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution campaign. The embedded URLs and link farm structure indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/jbkam2k0cli57hjvs629lrucj3/193527755.pdf
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083ddf867974---jelasubogo.pdf
    • http://xn--80aagkbrca3apkgkee0a1bi.xn--p1ai/ckfinder/userfiles/files/dedevizo.pdf
    • http://luxmeterthai.com/ckfinder/userfiles/files/rijoxodusujagomorex.pdf
    • http://stuarteisbrucklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/55644123684.pdf
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/bs7pnqqta07p5hph7l8rkhtst7/mamikogulu.pdf
    • http://afghansolar.com/userfiles/file/kavujatatove.pdf
    • http://www.abcklima.hu//data/editorfile/jawezubo.pdf
    • http://samrayburnclassof1980reunion.com/clients/873185/File/fazurogukigor.pdf
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/eef45cf3c00b1f9bebcbb23e74018d93/99444677950.pdf
    • https://heritagecambodiatravel.com/userfiles/file/vumijok.pdf
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0516776d09---midumagibanosebiv.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160985386c00ac---68265346719.pdf
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dca5f59a63---dulisidomuwijik.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160771845ea61e---82031636422.pdf
    • http://kath-kiga-bw.de/bilder/berichte/file/64960858695.pdf
    • http://sungsam.net/userData/board/file/lojigokogofufikixoluvuk.pdf
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/rkmdg3bfooi09d3sr57fujllt2/72580168333.pdf
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/997526da0ff66ee99a4b54ff011fbee5/13152303513.pdf
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1606c76459e3f9---fetematazorowuxa.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2020ddba1e---zesefo.pdf
    • http://studiotecnicodavico.eu/userfiles/files/fisanilidiwo.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a29cca3905f---ruxawig.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608454339379b---vubipuwodozujutuma.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=independence+municipal+court+phone+number
    • 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_off0000de89.bin
b603ea0631e414f3c9580ff52e6436e8b8d424ad9858a51de350dcfb9826c864		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE89 17272 bytes
font_01_sfnt_off00010bdc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDC 16792 bytes
font_02_sfnt_off000123f3.bin
988e63a5f3cf9c45f907e5bd3bc007a52136170bfc2ea612c3dcb26cd3e6b20f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123F3 10804 bytes

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