Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c3668166526c207…

MALICIOUS

PDF

86.1 KB Created: 2021-06-26 02:13:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 58ad5fdc730dba6a2f692fd02747ed06 SHA-1: ec0a966dd4449109bd0b0dadeb81de41ffa27370 SHA-256: 7c3668166526c207d9dcd5b868643806502af39f299ea6e847eeefba3fc9c27e
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The presence of numerous external URIs and link farm indicators suggests an attempt to redirect users to potentially harmful websites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860e9a6b720---74420803167.pdf
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608da476e4f83---12846249734.pdf
    • http://poltinka.ru/userfiles/file/xawomikiverewivewir.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa8ee814b9---76496411644.pdf
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/63670157105.pdf
    • http://beverleyannes.net/home/beverley/public_html/ckfinder/userfiles/files/90201639952.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f29f484044---dugemizalawesak.pdf
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb5255087e---fukaroreraxibavufi.pdf
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/b7468e40e072625add569996cfcfeb79/72662432486.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/dd53e7d3e4f5719421f40ec8b1661d8d/lesugugutiparadelokarerow.pdf
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/c373kgjmp0piju3tfsuv38avti/lofofizobifek.pdf
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071fae9e68e6---sefogoliwipetiminazogu.pdf
    • http://fmafirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lafekigusezenurudeg.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/mui26q5i66miompukpi5cka9e7/4594622851.pdf
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/5fa0859206cf57d70978e55aa1377337/waxoxulaxapede.pdf
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/i4i8ihnsojsfqh0d57rfh5qa9r/78417677177.pdf
    • http://leinerpakgelatine.com/survey/userfiles/files/zexadotarivuxafifi.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d571b23ce64---6121912318.pdf
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/3mjb9u2f3fpunbvjoood41f4t3/toxaw.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=lux+tx1500b+thermostat+manual
    • 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_off0000ebcb.bin
a9b2af4d042ceac1540b3a2164dbf3123c2503b7613a30d91cd3364f13cb1d1e
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCB 10888 bytes
font_01_sfnt_off000104f0.bin
fbf7d2185441196456957cdfb6ebf4b6989c08d7a9e3ad5b68febbb1e09a4b8e
pdf-font-stream PDF embedded font (sfnt) at offset 0x104F0 17964 bytes
font_02_sfnt_off00013381.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13381 16792 bytes