Malicious PDF — malware analysis report

Static analysis result for SHA-256 e54883ecdb8a7c2d…

MALICIOUS

PDF

79.6 KB Created: 2021-06-26 01:56:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-24
MD5: dc0a58430ca2621a5c75d1a2517cf4b6 SHA-1: e883c118cc87c2f2e2f8f263a191ddfce89e6b33 SHA-256: e54883ecdb8a7c2d8b70364d14436a1aa6ce34a6333d8b3efd57b05412bb5ea0
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. 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 suspicious score 0.4208

Heuristics 5

  • 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
  • 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://queure.ru/uplcv?utm_term=american+traditional+statue+of+liberty+tattoo PDF link annotation
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608d0d50c95fb---86652533508.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/57563360994.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/sunoxubite.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/d16d0290f405fcd282b2f3156e48932b/97605583588.pdfIn PDF document text
    • https://pfhotel.gr/ckfinder/userfiles/files/39524854548.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/60864819799.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6a3d03a88---36849853459.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609eba46de8a7---levisewejedago.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/0f4a225d9ce0728968081bca6d4c45ae/difujewupisazitemiwav.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b04fffa8e37---14876373954.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/kupudiratuvuvefudi.pdfIn PDF document text
    • https://andrejc.si/files/file/94697191286.pdfIn PDF document text
    • http://chayka-svg.ru/files/gevedowi.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608f8ae3a9830---tijabij.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/334facac6e9d4f4a7da211204d4762b9/81179201950.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5865c282c9---64584470644.pdfIn PDF document text
    • http://jkphotocon.org/data/userfiles/files/25414562470.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/42890432641.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160924e5c2b5ab---gisebatebozikem.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e053de3054---fizig.pdfIn PDF document text
    • http://splogservice.ru/content/file/12494292318.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/zanojiboleruza.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/63983011252.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3E 16912 bytes
SHA-256: ec39aa1763d51dcd10e1cb804e40452bc600c372aa9d92566548b420c1cd80e5
font_01_sfnt_off000119f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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