Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e00407f6b1dd365…

MALICIOUS

PDF

71.2 KB Created: 2021-09-26 16:44:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2c4868cd6d048e68bc0fb94509535f13 SHA-1: 3147d34ba2a813121f67227bf25cface3c27e387 SHA-256: 6e00407f6b1dd365f5d2bed98f9bd94b668033b085365790e1f48a2d8fd785fe
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ClamAV and an ML classifier, and it contains embedded JavaScript. Heuristics indicate it functions as a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of external URIs and the nature of the link farms strongly suggest an intent to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 7

  • 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.
  • 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 http://tajesink.com/Uploadfiles/files/davatogotopifiwaxolem.pdf In PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/29472207977.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130123643bc7---linivunufatifaxoletoru.pdfIn PDF document text
    • https://studioconcept-stand.com/fck_userfiles/file/41129505043.pdfIn PDF document text
    • http://ldksolar-officialliquidation.com/userfiles/files/vizoxipikes.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/96029449136.pdfIn PDF document text
    • http://el-master.ru/userfiles/file/82511894978.pdfIn PDF document text
    • http://gidaero.com/upload/fckeditor/file/lisakinitevepud.pdfIn PDF document text
    • https://n-v-v.dk/userfiles/file/18329825017.pdfIn PDF document text
    • http://ad.ditroinfotech.com/laportal/ckeditor-ckfinder-integration/uploads/files/67749949867.pdfIn PDF document text
    • http://hostingureitings.lv/uploads/userfiles/files/69992838421.pdfIn PDF document text
    • http://hengtongrongshang.com/jingkelun/userfiles/files/20210905054519.pdfIn PDF document text
    • http://paneldeconso.com/userfiles/file/rifipos.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/3ff1d9468389bcacadd0746d633351da/xerulijemuj.pdfIn PDF document text
    • https://sangolongphuong.vn/longphuong/news/files/10198322741.pdfIn PDF document text
    • http://podwierzba.eu/ckfinder/userfiles/files/bakajerejokuzul.pdfIn PDF document text
    • http://theemasternetworker.com/ckfinder/userfiles/files/62363332342.pdfIn PDF document text
    • http://hitplus.eu/userfiles/file/guzomizizitofidawopi.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161337e7dc1de6---80648631741.pdfIn PDF document text
    • https://shunnasato.com/sabonidas.pdfIn PDF document text
    • http://taketty.xyz/js/ckfinder/userfiles/files/65916856599.pdfIn PDF document text
    • http://area100impianti.it/userfiles/files/2665370806.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613e87241e753---xorifumekuxofepemu.pdfIn PDF document text
    • http://jainfarms.com/uploads/devurojijo.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/fowutekegokogubelefini.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/d4691ec18ff621327bb63f6a5d3b0c61/xirubabakar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=sufiyum+sujathayum+songs+mp3+download+freePDF 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_off0000b5a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cdbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDBB 15048 bytes
SHA-256: 3bf625358e7ac3f320b0df69f50f3a6cc039375d8979d53128e9b1a8ae0fed24
font_02_sfnt_off0000f36a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36A 11620 bytes
SHA-256: a26b94a9e11671c3e2b183cfbdabf8f2ce1a2835edf6a13943f810618d3d03d1

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