Malicious PDF — malware analysis report

Static analysis result for SHA-256 c14de7e42ddf2f70…

MALICIOUS

PDF

77.3 KB Created: 2021-06-18 05:16:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: f95a2350755b90fa8cf1b614cea13c9d SHA-1: acf35470ccaa919b4bbac110a5f9b29c67e6c8b4 SHA-256: c14de7e42ddf2f707efc3e7623bb18e4918fcdef11d49eaa677ce5d4eb53bc05
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing trojan. It functions as a link farm, directing users to download further malicious content disguised as movie files. The document body, though heavily obfuscated, contains references to movie downloads and is generated by wkhtmltopdf, suggesting a crafted lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bualuang101.com/backoffice/upload/files/46052199855.pdf In PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/2cee247d761197a0852e64502a8a1f38/jiwulobodolo.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608f69b2c0a86---31987584752.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/4ac75398eaba8728ae15afb71058eb67/koditepo.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/l970lhgjt2hbkhal5p4hk93916/jopebusiginumusexuvixo.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/dukezupedadobofiniduba.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/v5npisjmpo3ehcjojpiiouipmc/96771866918.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/83d11652cbd6e7568a8f3dab66a59346/rulijamujuzaze.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b42feaae1a---pirisalovukadizozu.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6f9448744---dosifabazidesu.pdfIn PDF document text
    • http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/48380681047.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/e8ea157db76a3360546cbac8fbc2f30c/7431557460.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081649614af9---dotazibasoki.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608615a4ee7ef---17055359707.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/fd0cc18f70bc38ee3746254070bd6a68/32188408071.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16097732ce2372---18798821381.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a76a67f0ba---62400444555.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/d55c2a2f40c00f9e275b5e1553ac97ec/zodutinupuviwijaxusabiga.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/m1894pthl3g8mel42vcu6apao7/xivuwapodisuzajovuzisev.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=sixteen+movie+download+720pPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE254 3172 bytes
SHA-256: 84d4228dc1591c7de6813db87d0c366edb06dca00b8476e43cfa86ccb52de9a4
font_01_sfnt_off0000edc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC4 5508 bytes
SHA-256: aa84f0148604dd80ccf03cc7a611053545812ebf3d2dd0cf8857f9c2411f6653
font_02_sfnt_off0001008c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1008C 11972 bytes
SHA-256: 7ddc1b7148d8413a7b8249c4ee4ded44f1cee49fb5b28220e502ad3ce83827ba