Malicious PDF — malware analysis report

Static analysis result for SHA-256 013c190239681605…

MALICIOUS

PDF

93.8 KB Created: 2021-08-09 18:57:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3846b727678994660def482aee732ec3 SHA-1: 5d30ddeec4f8abfe69edaeb7fd6a1c4b1bf431e8 SHA-256: 013c1902396816059e354fa8289bd730409b69227fa26ce458158e0a305903ba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, with numerous embedded URLs pointing to compromised websites, likely to facilitate phishing or malware distribution. The presence of multiple links on disposable or compromised hosting suggests a coordinated effort to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16083497318b0f---60761979054.pdf In PDF document text
    • http://thietbikhachsanvinhhung1.com/upload/files/saruwuvorutokugig.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/3c1b834eb5eaacc3ba7b6597de5d059e/rusategibedovaf.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/1105cfc3f223f3f709fa5fed1604b49b/33048952369.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa09e5188ec---sirop.pdfIn PDF document text
    • http://cerrutistudio.eu/userfiles/files/ronuludovajumelavifabuj.pdfIn PDF document text
    • http://holtfamilyreunion.com/clients/5/51/517903a0238f10651a3d170edcbd2d86/File/guwiwogodukufuvo.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/a339ae0e8e4f4b8da909c966c557aa6d/mimomupugatowogamu.pdfIn PDF document text
    • https://karapinler.com/calisma2/files/uploads/60577067253.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9fe8d68c2---nevav.pdfIn PDF document text
    • http://thecobbfr.com/clients/4/43/4363d5a08aa72aedcf7f7d4dd0675897/File/63971629121.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/lhemtlr9g2kccrc6q0s6dsdo2v/91314391540.pdfIn PDF document text
    • http://apsons.eu/files/file/madujizolezutawuzilina.pdfIn PDF document text
    • http://biomehl.com/images/content/files/muduzulolovimano.pdfIn PDF document text
    • https://viveironativodevicosa.com.br/ckfinder/userfiles/files/57462526844.pdfIn PDF document text
    • http://libron.pl/fckupload/assets/file/waragulimuxenotaled.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/att17vjusrj3g7l7o36nlblff4/pisemasi.pdfIn PDF document text
    • https://infiniteprospects.com/FCKeditor/file/67688459575.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076566f0f838---76752411822.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082dfec19458---42754369285.pdfIn PDF document text
    • http://csc0311.com/userfiles/file/20210706065023_80pu98.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fbe0fad26d3---61431356186.pdfIn PDF document text
    • http://jshanwoo.com/ckfinder/userfiles/files/93075939279.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/7751rp532ltk02bh31lsstnikl/xagivavekizarateg.pdfIn PDF document text
    • http://jarosi.hu/files/file/mefesasixavukatenupugesed.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=perks+of+being+a+wallflower+quotes+part+2PDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001095e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1095E 11216 bytes
SHA-256: 9ae53b57cbb9cda6bc33c969fd9df97204e2a6234aa7fba11dae41be3839d5f3
font_01_sfnt_off0001236a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1236A 16840 bytes
SHA-256: 701c8b261389d2d87efc3169e2fb91c70898a0e348a5f89af87d5d52f9f51394
font_02_sfnt_off00014f0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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