Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0754986cf64e9ec…

MALICIOUS

PDF

74.8 KB Created: 2021-09-24 06:38:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ee31fec4c5bee2115cd7707a5e15b3fe SHA-1: a0f2bac5a664920ab578dd79621d7e07c3ce2c28 SHA-256: e0754986cf64e9ec283f0fd0b4c8e67b49db51012cb677da9843aeb80f56938e
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress upload directories and disposable hosting, suggesting it is part of a link farm designed to distribute malware. The presence of a 'download button' heuristic further supports the phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://garglob.ru/uplcv?utm_term=world+of+test+drive+offroad+mod+apk
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613305ec39975---lubegide.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16138377dc8c48---4145225182.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140cc60d9d09---xuwokatiwumari.pdf
    • http://ibconsulting.it/userfiles/files/68819904665.pdf
    • https://www.rapn.ru/ckfinder/userfiles/files/vunumugisegumije.pdf
    • http://nemalipics.com/5896311066.pdf
    • http://aaaexpressheating.com/userfiles/file/26223419353.pdf
    • http://sea-cruise.ru/ckfinder/userfiles/files/53071788598.pdf
    • http://helder-effect.nl/userfiles/file/5588165767.pdf
    • https://macroedunet.com/userfiles/file/7205576290.pdf
    • http://webbuilders.com/files/file/munukinofadokemidad.pdf
    • http://tks-forever.com/upload/2021/09/13/file/sogudirexukifusonub.pdf
    • http://iscelenie.info/files/file/9775600387.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/79nq0m0hntvlksv4m77d68e35t/toparumotugixavupe.pdf
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/5751810a1287ec911b8817c43e2c0212/2805624044.pdf
    • http://profiklub.sanswiss.cz/files/file/gimevutasu.pdf
    • https://reparation-mobile.net/userfiles/file/55898803315.pdf
    • http://pinzimoniofiumicino.eu/userfiles/files/dawovidemazap.pdf
    • https://k-newsletter.com/ckupload/files/joxogodiliwovufomadav.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f97772ad7c---xitoboxetepuwufi.pdf
    • http://american-security-inc.com/assets/ckfinder/userfiles/files/podesatikusepisakerib.pdf
    • http://xn--80aagkbrca3apkgkee0a1bi.xn--p1ai/ckfinder/userfiles/files/59515976217.pdf
    • http://bacvietexpress.com/upload/userfiles/files/89759486120.pdf
    • http://logenamerica.com/userfiles/file/mijuzuwonotetirasurawis.pdf
    • 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_off0000bef7.bin
8fd1faf964fce4076cbf4faa577e98cce1cde87521066e857b2818fdf14173df
pdf-font-stream PDF embedded font (sfnt) at offset 0xBEF7 17540 bytes
font_01_sfnt_off0000eccb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xECCB 16792 bytes
font_02_sfnt_off000104e2.bin
6de53f98de0c041ca5ce5554013558326b14d04a79fa7c5ca6df836f5433e07b
pdf-font-stream PDF embedded font (sfnt) at offset 0x104E2 10704 bytes