Malicious PDF — malware analysis report

Static analysis result for SHA-256 9290d77c7848f801…

MALICIOUS

PDF

81.6 KB Created: 2021-09-13 06:30:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ddc07f61fc556be1b4b8c8c80be89e1f SHA-1: 94f743e19250388b8ff80fcd4eede547a2616a02 SHA-256: 9290d77c7848f801f0255024873e493f49d23ad7cb65c35308319af3757e09a4
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 0.9975

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://grandplaza.bg/uploads/assets/file/tilebagufufobetulut.pdf In PDF document text
    • http://kovove-ploty-brany-zabradli.cz/UserFiles/File/8168723691.pdfIn PDF document text
    • https://ww150007.linebot.net/upfile/files/20210902093839.pdfIn PDF document text
    • http://se-ty.ru/uploads/userfiles/file/mikegifurapimu.pdfIn PDF document text
    • http://lukoilmarine.com/ckfinder/userfiles/files/6036945023.pdfIn PDF document text
    • http://gift-founder.com/archive/upload/files/71286094919.pdfIn PDF document text
    • http://prochem.vn/images/uploads/files/pirukisakot.pdfIn PDF document text
    • http://dunajecbiala.pl/upload/File/rumimewotuzinixoramu.pdfIn PDF document text
    • https://regionalhealthprogramsww.com/images/file/93197158943.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131afed2e3d2---sitosofiminikamidiwusetab.pdfIn PDF document text
    • https://www.caissedesecolesdu5eme.fr/backoffice/ckfinder/userfiles/files/22391792656.pdfIn PDF document text
    • https://porfic.com/fotos/file/gadibikuvunodema.pdfIn PDF document text
    • http://infinity-pro.ru/userfiles/file/95427056480.pdfIn PDF document text
    • http://www.stsmcc.org/www/js/ckfinder/userfiles/files/46948025766.pdfIn PDF document text
    • http://3q1p.com/upload/file/210913025132898502r0sg39z3vl1l.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/0defec4f10791a3ad65ddeb107376021/zipabovuvaw.pdfIn PDF document text
    • https://birsamundapark.in/userfiles/files/jefuzemezipoxavutebugera.pdfIn PDF document text
    • http://3qbuy.com/CKEdit/upload/files/92732349250.pdfIn PDF document text
    • https://jager-ig.tw/up_photo/file/92374740845.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/madarilin.pdfIn PDF document text
    • https://mysmartedu.com/uploadimages/files/gidewapofulonesat.pdfIn PDF document text
    • https://szabobuszrendeles.hu/files/files/wejetowepakarapu.pdfIn PDF document text
    • http://eapver.com/upload/ckimg/files/202109080051434439.pdfIn PDF document text
    • https://magiccat.pro/ckfinder/userfiles/files/rotosofuruwofapumubor.pdfIn PDF document text
    • http://przychodnia-felinskiego.pl/uploads/editor/file/dasumixe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=avatar+telugu+full+movie+download+9xrockersPDF link annotation
    • 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_off0000d84c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD84C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF063 11412 bytes
SHA-256: 9cf9dc28c7c4befeb72084dff1ff1feb426f7a38af2233d2c844c52fb067cc05
font_02_sfnt_off00010b41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B41 17364 bytes
SHA-256: c3606f847097c562e104b1b39dd42fe21fb169ee53ee67b3fc5f380c12899da8