Malicious PDF — malware analysis report

Static analysis result for SHA-256 94239aa7b9f3dc02…

MALICIOUS

PDF

107.6 KB Created: 2021-09-05 21:25:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 680a6c47a083abae0e974aea7de74eb4 SHA-1: 128e42e410b0826d350af1c5493f243b99c8cc96 SHA-256: 94239aa7b9f3dc02c83a9669c275e65642b4df3a2a26e63e51416f43a1b59fdf
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. The heuristics reveal it functions as a link farm, directing users to various URLs, some of which are hosted on compromised CMS platforms. The presence of a 'download button' lure further supports a phishing or social engineering attack pattern. No scripts were extracted, but the overall structure and URL distribution suggest a phishing attempt to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://rosewoodcity.org/nbloom/fckuploads/file/jomowatowubuleriguga.pdf In PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/f2da71132eed915ed36f0311ecf1b10a/16876250207.pdfIn PDF document text
    • http://5lovestartw.com/CKEdit/upload/files/gawudo.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/ee1e01dcb56442eec2e8de855138efd9/zepupewutenif.pdfIn PDF document text
    • http://daotaonhaccong.com/uploads/userfiles/file/61625603622.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/ladorimetiwurigekuzir.pdfIn PDF document text
    • http://nagymester.com/userfiles/file/wukorabaduluz.pdfIn PDF document text
    • https://habibitoursegypt.com/ckfinder/userfiles/files/92686933241.pdfIn PDF document text
    • http://pastoret.it/userfiles/files/28620936723.pdfIn PDF document text
    • http://onlinepravenconsultant.com/uploads/wysiwyg/files/sasexodosewiduxi.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/pudpdb532kv6vuopc0hgmheqh9/34254343377.pdfIn PDF document text
    • http://digitalpolicycouncil.org/imagenes/file/liwexuxanuwunudul.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/waraziludotunurij.pdfIn PDF document text
    • http://serenetransformation.com/clients/870552/File/sodamadokazemusuro.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160cea420a8b04---89169515485.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a29cca3905f---ruxawig.pdfIn PDF document text
    • http://vlajamo.cz/images/file/44605949734.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a97ac2008b7---76214588730.pdfIn PDF document text
    • http://dagmar-e.de/userfiles/file/30362690756.pdfIn PDF document text
    • http://markone-tools.com/upload/files/javonategixafogig.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091322a4dc94---86533897374.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-5-15/20210515161929735364.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/68756058419.pdfIn PDF document text
    • http://nuovartea.eu/userfiles/files/lisanuralizeka.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=ford+ranger+2010+workshop+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_off00013aa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AA5 19900 bytes
SHA-256: 4bf6491eae818e16db8c33be663d9dce5d56f80de583a8ae2190cb6fec1ded2f
font_01_sfnt_off00016e16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E16 11196 bytes
SHA-256: e9ba8445b9fd0da148bec3073de1a2af76e5011363f4c94cd9619c859f39563e
font_02_sfnt_off00018801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18801 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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