Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bc102e049c97f99…

MALICIOUS

PDF

99.9 KB Created: 2021-06-27 14:22:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 86ae85e1b0f1247abab3ab5cd6d2d581 SHA-1: 0e89c7262c00f176d89562a3f86c20f2454488b2 SHA-256: 7bc102e049c97f991398cd5141013fd3f9d78fc4983a0fb79da50f70b8dae140
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites, designed to trick users into downloading files, likely malware. The presence of a 'download button' heuristic further supports this phishing and download lure tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9704

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://ketchas.ru/uplcv?utm_term=gta+5+apk+obb+zip+file+download+for+android PDF link annotation
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a08da6c7f05---21427538017.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e3b2987e46---menemapesebagikijonolenir.pdfIn PDF document text
    • http://alda.pl/ckfinder/userfiles/files/zawidukazowiso.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077db409209c---tezoraburifakupujexum.pdfIn PDF document text
    • http://tablica-nieruchomosci.pl/uploades/fckeditorfile/runopesitutuvugigivanewid.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609630d5f3395---61004979649.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/kfblq3bvsmlgmti0dpgt5klt3e/nanibirupogumafelut.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/wizidovon.pdfIn PDF document text
    • http://alarmy-kamery24.pl/userfiles/file/zapogajet.pdfIn PDF document text
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/d7cj7cffsni9d44iuf7d633qbv/14209566591.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078acc35d9da---74726678587.pdfIn PDF document text
    • https://arket.io/wp-content/plugins/super-forms/uploads/php/files/524kat6mi3m5k1lir6kkcmbg42/55053457081.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a57a1c39a99---36437718389.pdfIn PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160848cc47799c---pobewijutalupo.pdfIn PDF document text
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9b2c8ca6b---gigamesalimolopegosiwix.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/queoir05qnm0jln3e3k8m1ojak/najaj.pdfIn PDF document text
    • https://maggies-handmade.com/UserFiles/files/6765157782.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/lvaap3d61k8l6e02lg6r8gerd3/9534428594.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afadcc514b8---bejibevigi.pdfIn PDF document text
    • https://akamercedes.com/images/uploads/files/todozasizasixetasunepi.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/a4vvs4h64f4788a8f4oi0lrgep/46325002647.pdfIn PDF document text
    • http://www.adarshvidhyasankul.org/userfilesfile/44101946946.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/72052015983.pdfIn PDF document text
    • http://malverne69.com/clients/a/a7/a743c233813d1a1dbf5c38c484d85cdc/File/panumuminesibediviwuxasi.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160d0803608571---59128629110.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/65527fe1babd7065454ce2a5be4de791/xuvuguxefezijeriv.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001245a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1245A 17536 bytes
SHA-256: dbd78ec32d6eecb2d8f0e8a29540d0a8451d75ca62910aa65c26aaa297bc49ba
font_02_sfnt_off00015271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15271 10872 bytes
SHA-256: 2ccb0520aa8f441fa11d2a0fd38058a706c15670c9e529f9122b0f20dbc552f2
font_03_sfnt_off00016b9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B9C 16140 bytes
SHA-256: 00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b

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