Malicious PDF — malware analysis report

Static analysis result for SHA-256 866c07ea171cc9c8…

MALICIOUS

PDF

108.2 KB Created: 2021-08-14 21:53:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: 02c3e965e8b8d37f841e6a5ac7e54b46 SHA-1: 5fd03d14d12cd8181e8a202bc1f4252ef4b94101 SHA-256: 866c07ea171cc9c88c59a867bf32629ee8fd6718981bc3148a1c01b5ce40fbe8
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 0.9932

Heuristics 6

  • 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
  • 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://wastran.ru/uplcv?utm_term=algebra+i+eoc+staar+readiness+review+and+practice PDF link annotation
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8bb9a79471---tifurage.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-5-2/20210502224534231608.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160812efd92b0d---nojurexugebeleruxafaxono.pdfIn PDF document text
    • https://hmanagement.net/userfiles/file/48496485235.pdfIn PDF document text
    • https://nguyenvanhuongloc.vn/app/webroot/files/images/pages/files/72271399622.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/a43dda5875e67e56b875ec8fd7311363/libekunom.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/1bfec2362936e31421604715b7d91522/50736980951.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16078639e484cc---fabebakiwimokuzavetajoj.pdfIn PDF document text
    • http://hungbuloon.com/media/ftp/file/wokemifedovinojewa.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd6e60ec3c---69459797056.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd2be6ca43---56476528608.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/6be8b547d8770c901d644878f1c0f2b8/xagojaxedekakubipojuzuvil.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d86236aa67---53350281662.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c5d74da71ee---kizozifofemoje.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/ch0ej3n1krjvrs7pkcova6m1r5/63641464507.pdfIn PDF document text
    • http://vipnovini.bg/root/f/uploads/files/55038457721.pdfIn PDF document text
    • http://christopherspubandgrille.com/userfiles/files/57989516646.pdfIn PDF document text
    • https://berbagiangka.com/contents/files/24159406435.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9954bd859---56849153913.pdfIn PDF document text
    • https://www.saammohaseb.ir/wp-content/plugins/super-forms/uploads/php/files/7c4e81fe02fb5dd73ef4e6378a52c80e/5546928662.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/16098328bd23d7---30455520123.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160be0277d0933---66911869922.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001039e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039E 29648 bytes
SHA-256: 07531cf84774b56ff14a263197d1d7dee1809d1001b9e0ca720f972cd459591b
font_01_sfnt_off00014b90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B90 2496 bytes
SHA-256: f12933d8460389dd93b718f221ff92b12fe342b8dc0359a54cab3543e144ceb7
font_02_sfnt_off00015611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15611 10960 bytes
SHA-256: d0cdfb94943c7962ff8d3e06e46186eff7c988dd78d7320a92391eeb86d2ef33
font_03_sfnt_off00016f44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F44 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off00018755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18755 17296 bytes
SHA-256: 07ee683918a21f200d539a7ab9b11b26d3cfd81668ad0ea506eee7e37657b0de

Open this report in the interactive analyzer, or submit your own file for analysis.