Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6ef5a395b17f0ff…

MALICIOUS

PDF

75.9 KB Created: 2021-09-10 22:01:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 039868105e585102971e5b5931a87b15 SHA-1: 795858a7f3576dc1ae5aa8ad500afa6d5c2dcc38 SHA-256: f6ef5a395b17f0ff13fa10bee1ad97d5bf39f47bb615ef1616d10f9af915f909
134 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 and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://smidgel.ru/uplcv?utm_term=friv+strike+force+kitty+last+stand PDF link annotation
    • http://paglialonga.it/userfiles/files/29915481105.pdfIn PDF document text
    • https://m-isc.com/userfiles/file/23362850715.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/toranuwadepipiwaxoniz.pdfIn PDF document text
    • http://metamorfoza-krosno.pl/userfiles/file/98340806374.pdfIn PDF document text
    • http://fastcredit.ge/userfiles/file/82596012532.pdfIn PDF document text
    • https://mediaget.ru/userfiles/files/20811960423.pdfIn PDF document text
    • https://il-gusto.com/images/file/jipikokupoxe.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139d5030aea1---32691157203.pdfIn PDF document text
    • http://tcyy88.com/userfiles/file/2021090806185473499.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/4657548863.pdfIn PDF document text
    • http://www.hro.ait.ac.th/js/ckfinder/userfiles/files/62176863256.pdfIn PDF document text
    • https://www.sonorisation-auxerre.fr/ckfinder/userfiles/files/nikevigapafeloradusoza.pdfIn PDF document text
    • http://www.gabrielamaciel.net/images/content/file/kawetobinovifi.pdfIn PDF document text
    • https://psiakocky-potisk.cz/webpagebuilder/ckfinder/userfiles/files/mubapufibabogarofopobijo.pdfIn PDF document text
    • https://fullprotec.com/ckfinder/userfiles/files/rotazafivupoguxixiboxe.pdfIn PDF document text
    • http://master-sign.ru/ckfinder/userfiles/files/28120196192.pdfIn PDF document text
    • http://omeofest.eu/userfiles/files/pujivanukikozew.pdfIn PDF document text
    • http://synhbio.com/upload/files/74331275691.pdfIn PDF document text
    • http://orikon.net/Images_upload/files/pomewetogijafaw.pdfIn PDF document text
    • http://npas.ru/pic/file/tedizogalokitibopetulaguj.pdfIn PDF document text
    • http://tantex.org/tantex/tantexuserfiles/file/votizodevajifipi.pdfIn PDF document text
    • http://yacpa.org/yacpafiles/file/77883232181.pdfIn PDF document text
    • http://jadeite.ru/images/file/dakixajufigoxu.pdfIn PDF document text
    • http://majedalkarkhi.com/pics/file/28999973949.pdfIn PDF document text
    • https://didaktika.drmix.cz/uploads/files/tafif.pdfIn PDF document text
    • http://ieltsadd.ir/cache/fck_files/file/37888139831.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_off0000c0df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d8f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F6 10720 bytes
SHA-256: fbc6ad2e7b9484bf0153fbed4b1c9b10b2c2d899a8ccc15db32089eddad2b6c7
font_02_sfnt_off0000f1c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C4 18524 bytes
SHA-256: 4cdd8627a351255b04f5511d34d8a833e37b0ca92bd07e9ffbc2622b2b314559

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