Malicious PDF — malware analysis report

Static analysis result for SHA-256 69532339e6777be4…

MALICIOUS

PDF

69.5 KB Created: 2021-09-28 21:45:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cdcdb44151ffe78d075d4094c7b49642 SHA-1: ea3f250918cf2bb90cb5533cdaae222281044c6c SHA-256: 69532339e6777be416633dfe03ae993dded0966dc1851ed8353b4bf04f1c0aba
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It contains a link farm pointing to multiple compromised websites and disposable hosting, designed to redirect users to malicious content. The presence of numerous unknown URLs suggests a broad attempt to host malicious files or redirect to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 https://vildmarksjagt.dk/userfiles/file/wubaxigut.pdf
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/e304a0a635d556334e07513f8b5c24e5/zepunukevufa.pdf
    • http://stmarysharipad.com/userfiles/file/fawobirunejet.pdf
    • https://egokituz.eus/files/galeria/files/73662348597.pdf
    • https://icnj.net/ckeditor/ckfinder/userfiles/files/57405286523.pdf
    • https://maxlinder.com/admin/assets/ckfinder/userfiles/files/dadunipukeronuxo.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/8a48cd0b320c9d6c774605eb00fa85e0/mefufosiwijewozidufev.pdf
    • http://aorganboys.handyfriendship.com/upload/files/87815972359.pdf
    • https://tootooair.com/FileData/ckfinder/files/20210903_AC0B3D234E84AB15.pdf
    • http://www.vljainandco.com/userfiles/files/jukevirigazisivolute.pdf
    • https://blogsma.com/files/vumosejilodejafaxodad.pdf
    • http://hcbarrett.com/user_area/file/vapukorovebelubedu.pdf
    • https://demircanticaret.com/userfiles/file/kinixebibaxoge.pdf
    • http://ahnil.com/userData/board/file/37728524.pdf
    • http://koddous.com/userfiles/file/39048718586.pdf
    • https://vili-al.com/uploads/wysiwyg/files/gelokagetarabarenilugu.pdf
    • http://kingsfinancialconsulting.com/userfiles/file/81817367749.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16131fec70529c---lujibuzukijobipapeferutaw.pdf
    • http://baovethanglongmb.com/upload/files/10397308847.pdf
    • http://www.aragonemprendedor.com/userfiles/files/mumafutaboke.pdf
    • http://www.sintsprev-ms.org.br/ckfinder/userfiles/files/26840748616.pdf
    • http://koala-al.com/d/files/63449452414.pdf
    • http://ptaki.info/imgekoprojekty/files/xazal.pdf
    • http://baove24h.org/upload/files/felilaxuv.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/16149d65adfd32---vixoxegupezafufito.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=measuring+app+for+android+phone
    • 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_off0000b17c.bin
3222d3ddc2c63cc0cfc6cd3aa253571553feafd7e5eafddc3707fe8af1525fad
pdf-font-stream PDF embedded font (sfnt) at offset 0xB17C 15408 bytes
font_01_sfnt_off0000d806.bin
a52d7b6719f1671e027ff7beb65108299c4557a8f36efbbdf1801cbe87d805e9
pdf-font-stream PDF embedded font (sfnt) at offset 0xD806 10728 bytes
font_02_sfnt_off0000f053.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF053 16792 bytes