Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e0a2edb7b387fcb…

MALICIOUS

PDF

89.8 KB Created: 2021-06-30 05:31:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2b61e092cd192ff2c0f5e999362cb25a SHA-1: 00eabd2fa63b545835e6db069a70de2b113026a1 SHA-256: 8e0a2edb7b387fcb5af2f4341bef21d392bf107bd56e65fcf441cf458d0d18cf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised CMS platforms. The presence of these links suggests an intent to redirect users to potentially malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 http://omegapizza.net/uploads/files/vekukegasifawekifawivat.pdf
    • https://limblength-sldf.com/userfiles/file/kozafizomodinoso.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/10d677fd6f15a8679e553f0e2dbddd24/gijotetozevakezinusefufav.pdf
    • http://tfh-filter.hu/_user/file/xokupabavowagelux.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5d02a86fb5---somofeborajalobivelu.pdf
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/7ee17e4fd6485754f2d67910b17ea929/lirogewirigusejalawuxilaf.pdf
    • https://yingzhaoliuart.com/upload/file/jujoguriliguko.pdf
    • http://zpkprzemysl.pl/ckfinder/userfiles/files/35058237717.pdf
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/4e4a18513b55e20426e051671812d66e/88679508499.pdf
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/41170b9c9b24cd3312e8ccaa2412f567/wafupabewakowopusejiwuwe.pdf
    • http://szpk.hu/_user/file/90898489067.pdf
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b172bd70f---76957058602.pdf
    • https://agentcctv.com/userfiles/file/37550378980.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/16077d0afb9007---27181914309.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c34d0155ac0---vefoteb.pdf
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8c634448845c2ddab7c07e022550d52c/tozebotadijotige.pdf
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9ab89b327---32216643261.pdf
    • http://alpanelektrik.com/depo/sayfaresim/file/suwunipumin.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d01c1b3a560---94920357191.pdf
    • http://nensi.si/upload/file/vapijokopemovuv.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca25dcf6d6---16676144853.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=high+school+musical+the+musical+the+series+episode+2+watch+online
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f96d.bin
6cda2f1f877c97629cb40788b5e8c1e9f407603eb18a094b78f84b7341de0470
pdf-font-stream PDF embedded font (sfnt) at offset 0xF96D 17516 bytes
font_01_sfnt_off00012762.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12762 16792 bytes
font_02_sfnt_off00013f79.bin
f843fe3c9e40fbe82e53645a09d2e60a432bb0e94987227ee8c878d2b46e9034
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F79 11256 bytes