Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2e2e8aa36f418b7…

MALICIOUS

PDF

85.0 KB Created: 2021-09-02 03:00:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8f505b786945edbeef0ffffffdee77f6 SHA-1: fa058c891fdc0b0e889a375642e6a8ae1a8ba7f2 SHA-256: e2e2e8aa36f418b751839d11a467303338b729ef00d2241c001118a82c8323ca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous links to external websites, many of which appear to be compromised or disposable hosting, suggesting a phishing or link-farming operation. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://ketchas.ru/uplcv?utm_term=software+architect+interview+questions+and+answers+pdf PDF link annotation
    • http://texmet.pl/userimages/file/91734979816.pdfIn PDF document text
    • http://chaitraglaze.com/uploads/marupajeludeturur.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc6503d19c3---75464114717.pdfIn PDF document text
    • http://biznesfishki.ru/files/userfiles/files/jodokojitijokir.pdfIn PDF document text
    • https://www.hinkler.com.au/application/third_party/ckfinder/userfiles/files/40592125763.pdfIn PDF document text
    • http://www.dawnrotaryclub.tw/UserFiles/files/zimugorelofipupenaku.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5847e0990---75143731123.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d27851d1058---naforinupukonimidawa.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160f3bd23ed0e5---wukuniwapoxiruz.pdfIn PDF document text
    • http://springbook.no/files/tugexinisuripag.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609521a3e36a7---moponasoke.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/cfa296f42b869ffe5c98eb54b7d586cc/74032437822.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/ststg6rj1nrrlvj92kkk54vp9d/88809871939.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160928ba250a79---70709114137.pdfIn PDF document text
    • https://hophamthaibinh.com/upload/files/35588481729.pdfIn PDF document text
    • https://www.temtechnologies.fr/ckfinder/userfiles/files/sopuzifilekejigijisen.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/00410b741647d6dd09f3bf82cd54caa8/75029331576.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16085ba7f5fd24---togajas.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/6693676596c1a09d23886a1e19b57550/51103864386.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/b25cd486204c3c65805818db49e3983b/lujuzelaxirikigunir.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/7600095966.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/161133ec46d03b---mawepisurepotesiwaju.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/52b0na2lr1992m6vq99m1v4b93/kuruvid.pdfIn 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://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_off0000e751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE751 11144 bytes
SHA-256: 9922ef96d07f4e97044be02a48c04f890e756f7ef4e21ef445aab3d87dad9aff
font_01_sfnt_off00010128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10128 17272 bytes
SHA-256: 4b7986a7c1b7a634c13c53fa77a6683b764299ec705575d389b83c818a14f94e
font_02_sfnt_off00012dbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DBC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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