Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b94a9201c0655ea…

MALICIOUS

PDF

79.9 KB Created: 2021-09-06 12:12:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 08477cdd0981ad3a88c87b4ad7501fc7 SHA-1: 308c71f2893879fb634656cd3e003305c8bd1c82 SHA-256: 2b94a9201c0655ea36955cb608393be1e3db1785070336dda113c44dc6fb6311
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It functions as a link farm, containing numerous URLs pointing to potentially compromised WordPress sites, likely to manipulate search engine results or host malicious content. No scripts were extracted, but the presence of multiple external URIs suggests an attempt to redirect the user to a malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • 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.
  • 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://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/d052a8d1817cfd9bed7a6dc1fe06ef9e/vifutasisobes.pdf In PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/6vacunp87r2pn7uvtk1nttiso3/93218522583.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16080bdfa17573---6870635291.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16085c40fd08eb---59902349956.pdfIn PDF document text
    • http://apogeeconsultancy.com/upload/files/milomowa.pdfIn PDF document text
    • http://canvangdientu.com/images/file/52217086280.pdfIn PDF document text
    • http://erdivigado.hu/userkepek/file/vasetogifoninomevavimevi.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//belimarujetemow.pdfIn PDF document text
    • http://capthepcongtrinh.com/uploads/news/files/jazasezidofosuwi.pdfIn PDF document text
    • http://biotop-zamosc.pl/userfiles/file/xefafonebodemux.pdfIn PDF document text
    • https://samarthanamparisara.org/apadmin/uploads/userfiles/files/gaporibila.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/mq1ilgmfcvq1ud8onmermi6ddo/26383084226.pdfIn PDF document text
    • http://pi-consulting.ch/download/29780373836.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f88fc193699---tofufokabagosa.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/800035413e6c1e2db5fe70b443def3cc/76595515213.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/d25470c3c409e1eef7848f8aed805683/77417536611.pdfIn PDF document text
    • http://aptchasers.com/FCKeditor/userfiles/file/35110725866.pdfIn PDF document text
    • http://denis-lefebvre-services.com/fichiers/file/67521604297.pdfIn PDF document text
    • http://naosgym.com/userfiles/files/14982188563.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/91a3f4525bcf67cbd01800eaefa1361f/69917033343.pdfIn PDF document text
    • http://azstorestudio.com/uploads/files/jetozamo.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/mas9aav744vi13pbq8pm6gusc2/vazetabo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=1997+honda+prelude+haynes+manualPDF 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_off0000d163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD163 10856 bytes
SHA-256: ba11b7e56a0af299cec43cb317db6a61dda3fdf42174381844bc7ed564b88be1
font_01_sfnt_off0000ea58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA58 18480 bytes
SHA-256: 7521bf73c478a0dd98a5ea4eea7f32dd6e88407c6499b84bc67b64e5823dad74
font_02_sfnt_off000119e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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