Malicious PDF — malware analysis report

Static analysis result for SHA-256 00ea21921d0821d6…

MALICIOUS

PDF

78.5 KB Created: 2021-09-02 02:19:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 0cb74c38bbffb4b2d0eeb88f59a3b0cc SHA-1: d1f6a683a9db7d28b06c2f1cbf1b0a41d0d2ee84 SHA-256: 00ea21921d0821d628b20358f54490a1d4f9283a4cf2ef8964cb9d93aa112ef0
156 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 0.9909

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://philabc.ru/uplcv?utm_term=ancient+egyptian+civilization+3as PDF link annotation
    • http://ggmtc.net/userfiles/files/bowilodusil.pdfIn PDF document text
    • https://liur-krd.ru/userfiles/file/82370765836.pdfIn PDF document text
    • http://51-lq.com/userfiles/file///xezojefafu.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/wovogemexudejebulesu.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/lupokudovori.pdfIn PDF document text
    • http://beachhigh65.com/clients/879402/File/54409130971.pdfIn PDF document text
    • http://www.netcorp.hu/data/editorfile/45524839509.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/bagukixu.pdfIn PDF document text
    • https://www.qualityitalia.it/ckfinder/userfiles/files/66344014353.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b52980cec3---25770858596.pdfIn PDF document text
    • https://lawrenceyezersky.com/userfiles/file/58799664610.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f30297aba4---mijubifa.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/gik8u2b8l1sihg8fmtcte6f5e3/nijovawu.pdfIn PDF document text
    • https://bnbcostaverde.it/userfiles/file/96936304145.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1fb6d2ddb---76487773808.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a877229785---32548440298.pdfIn PDF document text
    • https://eternalbliss.net/file/71630740896.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/letekapasipaxutej.pdfIn PDF document text
    • http://jogamiskolc.hu/ckfinder/userfiles/files/puferizulowedivili.pdfIn PDF document text
    • https://tutorsbureau.net/userfiles/file/xivumuvezidareriro.pdfIn PDF document text
    • https://gea99.com/ckfinder/userfiles/files/kogorovisopowonusapi.pdfIn PDF document text
    • http://taikenplan.jp/ckfinder/userfiles/files/96457264122.pdfIn PDF document text
    • http://fslawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/90000285052.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16114e01089729---rinegetusetikelitama.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16098475d66c3c---sepulafipikunojigememix.pdfIn PDF document text
    • https://sca-kc.org/scauserfiles/files/48246921589.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ceb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB1 10844 bytes
SHA-256: 7669779e775ac875238ac50d2ba9c7feb22b042fab5361989f5194953236bd93
font_01_sfnt_off0000e7fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001000e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000E 16624 bytes
SHA-256: 6b360618e57dce8f1bf14ba899ec8c8f66b74fb87700d49e06d23142fda13b36