Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ad0267f7d21939b…

MALICIOUS

PDF

86.4 KB Created: 2021-07-31 22:28:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 39c56481b3a3d5eae138881a4162e47c SHA-1: e2fc7e076ab1c1248689c10ed479df4d051ecc8a SHA-256: 2ad0267f7d21939b766d0408455b197b06f6a67095ec85359a6e11c411cbc1b8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 0.6740

Heuristics 5

  • 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
  • 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://smidgel.ru/uplcv?utm_term=les+accents+exercices+corrig%C3%A9s+pdf PDF link annotation
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c986d74875---58537312377.pdfIn PDF document text
    • http://hornets88.com/clients/56662/File/44813710485.pdfIn PDF document text
    • http://princeton1959.com/clients/863834/File/35300314935.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160aee5b30dfd8---8838595816.pdfIn PDF document text
    • https://aquatrustfina.com/userfiles/file/40689871230.pdfIn PDF document text
    • http://travellightnepal.com/userfiles/file/67751989593.pdfIn PDF document text
    • http://srub-servis.ru/userfiles/file/fiwewepoputixomilosa.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/fa93e6883d4870086d924f283d67b219/didejavasaw.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/c68e6ebb8100b23dba9ade77f8fec166/wudumisigegokuwaz.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/files/vetujopoverowexudiraru.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/2b4h1l274iuolmjaifmgj9f4l1/67186753718.pdfIn PDF document text
    • http://photo-preiss.com/upload_files/files/naxaso.pdfIn PDF document text
    • https://tarzminder.com/resimler/files/xixinusuvavix.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/5solbuls2leluclhv7tp1cmalj/6600656757.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/8b1c2043fced6b7978da9112a78aa3ba/gevinagerarijareluf.pdfIn PDF document text
    • http://tourbusan.net/FileData/ckfinder/files/20210708_7858A647528345EE.pdfIn PDF document text
    • http://mimarkamilozkartal.com/userfiles/files/nejer.pdfIn PDF document text
    • http://aerotechgroup.ru/img/outer/files/55675368497.pdfIn PDF document text
    • https://nonbodepsg.com/uploads/files/3095668370.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160826ebf70da6---serazutujavotewazuro.pdfIn PDF document text
    • http://bpsstudio.hu/uploads/momuriliguzixap.pdfIn PDF document text
    • http://rc-modeller.se/images/file///dujepagekif.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/gimojugedap.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d69e6b2a047---motujuze.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E0 10964 bytes
SHA-256: adace391351cf20aa073ca186a08b371e447a17ee30b51fc598e851c3e710cdc
font_01_sfnt_off0000fff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF6 18520 bytes
SHA-256: b8950f06b1d6e2b7b33387e1497520e0c41b750e613aa9de9a8d61b505f62b2d
font_02_sfnt_off00012e59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001466a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1466A 16684 bytes
SHA-256: 0b66887e43cc35630d0970669c797ecfbf492bb097841a83f6681a0f5b87338d