Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed0a4a97634e9aea…

MALICIOUS

PDF

83.7 KB Created: 2021-09-07 12:03:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ff1732aed33778cbde3f364cd8d06c86 SHA-1: 6151d7a9ff13e0f611aea9bf069ab5c30a122d34 SHA-256: ed0a4a97634e9aeadc5a23023a03efad58664e96b3b808242221d17b5f407e57
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and links to compromised WordPress upload storage, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure points to a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://crysiq.ru/uplcv?utm_term=java+swing+tutorial+pdf+for+beginners PDF link annotation
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e728c63a231---31035367799.pdfIn PDF document text
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/texekejatuv.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/005d02bb4378d112778351695ef6d1cc/siwagexesulidofudoleso.pdfIn PDF document text
    • https://solener.info/ckfinder/userfiles/files/retodokisub.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/lejemuroso.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/a300e710efc789ce6987e71e4001b5dd/7524021633.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/4ec779e8201f0053a103037aad65ae18/baber.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2257d56ecb---rikebafasozuwuzufukoroxe.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608e15ffa3277---87782854538.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083a9a2238dd---korewuzapaw.pdfIn PDF document text
    • http://slstudio.it/userfiles/files/26537224061.pdfIn PDF document text
    • https://kclandscapes.com/ckfinder/triplebuserfiles/file/12591512475.pdfIn PDF document text
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/qvisdr5qo68at1o6gl9ssr29g4/64781131659.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/98091349535.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100c1bb08087---62254147872.pdfIn PDF document text
    • https://imaggu.com/ci/userfiles/files/luvaregudawosa.pdfIn PDF document text
    • http://bocghedanang.com/media/ftp/file/zixiwugajovolewavor.pdfIn PDF document text
    • http://americanpetrochemicals.com/customers/CMS-IMAGES/file/32329211086.pdfIn PDF document text
    • http://plymouth-logs.co.uk/ckfinder/userfiles/files/44172822025.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/d3b3a22613a9f5702d4ce32977979e78/zimowixasisetepasu.pdfIn PDF document text
    • http://laulumaja.fi/ckfinder/userfiles/files/gabonidudajupadute.pdfIn PDF document text
    • https://bdaudit.ro/userfiles/file/82378192745.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cba752b038c---76318920479.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE019 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f82b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82B 18188 bytes
SHA-256: 7fc527f79014acfcc26d7f6246d4c81a30f1d610ad509de71f32e3cb3d4381dc
font_02_sfnt_off00012783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12783 11056 bytes
SHA-256: 86cdf17393d0077086f491f4f385b4eca5979dc4f870b3e78a1f9822d02064d4

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