Malicious PDF — malware analysis report

Static analysis result for SHA-256 fafda51a9382bc27…

MALICIOUS

PDF

140.1 KB Created: 2021-06-17 08:54:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 55731e9b1f6c7c38b2ac0ca2062c89d8 SHA-1: ebdc7a81e673c7c745e928a71e7cef6d77fad975 SHA-256: fafda51a9382bc2737e5ef29b61115223ee9f1965c64845679684b8ede797083
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://inwebjor.ru/uplcv?utm_term=vedic+havan+mantras+pdf PDF link annotation
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/152438a8183b8eff06247606bb0eae83/83548747009.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/d57982b2034a9df4928fbc8d663d609b/tizozujawopekolezoru.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/b1a12f2e05bb753df6e0af0bf66bf4f1/5537609999.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/qogp082i92qj7tb2dkocm08oe8/vofezamumamuzuneju.pdfIn PDF document text
    • https://audit-advisers.com/userfiles/file/bugoporibi.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/796f655e8f48bbe5e45f8ef28950bbfa/88750493992.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/rotodadikenewepevorexone.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/vhcdaqrph315a452rkic8v36r9/satukodujutopopuzavelot.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/ef5360ab77032b6f1dc7c99f4abdaf79/liwezafix.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757f30e7394---bikedi.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e15e0e477---fejuzofirupokabu.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160720972d6e61---38949045729.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/cvmu7aod0ghug4f5o8ngiugj3m/12793823289.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/ev56a38hbshcsrpunsgjgvlbov/suzusexedopu.pdfIn PDF document text
    • http://unesco-mediain.cz/fckfiles/file/vividar.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/3291876354.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/loxedijasowuxinifodosenol.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210608_071242.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0001f5ff.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1F5FF 14616 bytes
SHA-256: b358c0ca6e0ef436fdeb5657fef454c076b48e9ccb3bb6f87ecb7d8aa6a1df8b
font_00_sfnt_off0001b3dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B3DD 5388 bytes
SHA-256: 09b51df0eacb08cc72aa407f601cf418b66d2d6aca64b67edd6142635280c2eb
font_01_sfnt_off0001c60d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C60D 3772 bytes
SHA-256: 9389eabb5da0f7ff5893e499ff791b47d46466a46589dcf6e6727fbd9e34bd63
font_02_sfnt_off0001d1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D1B3 10620 bytes
SHA-256: c41476a91065538dadbff9c893af71d1b1e44681afa1a3e91bf0cc4eb2254d3b

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