Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f29d6dec47be5b6…

MALICIOUS

PDF

84.7 KB Created: 2021-09-08 11:15:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8867972604913caff1d04f8e1cb3b0c9 SHA-1: fca431f23df1a5c0d9e9f84ecc443b3cfc8fbc73 SHA-256: 5f29d6dec47be5b692c2399aad219af2f1f5479700a5dfe2649e87c749769a39
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or are hosted on disposable domains, suggesting a link farm designed to lead users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://lacecinella.com/writable/public/userfiles/file/28118094058.pdf In PDF document text
    • http://zrdb-drogbud.pl/Upload/file/23338783196.pdfIn PDF document text
    • http://parvazyab.net/basefile/api203/files/14641500216.pdfIn PDF document text
    • https://at2-turbo-j3t.com/contents/files/filelefarin.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc04bb2ea48---44603966179.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/d9b2a3b12ed1a0efac4e53b1dad25203/47890709420.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/43842259169.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16079c4432d465---bizepevototajekovesijemet.pdfIn PDF document text
    • https://ukmriptek.org/codeIgniter-hmvc/userfiles/files/sidavilexazamux.pdfIn PDF document text
    • http://myucpb.com/userfiles/file/mewagakepulose.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/sielkn6p7oh5ca9q8mc15donu7/kuvewadamekobugubuwum.pdfIn PDF document text
    • http://axwelindia.com/uploads/pugatuxugenikozugifot.pdfIn PDF document text
    • https://airbays.com/userfiles/file/18802614344.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/31c5f6138b7f809c607d26000425ca98/50583012825.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/11350603862.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/59275922179.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/atjoiluqirt28bvde1h5f5cd71/15882510575.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c1d04c68764b162c76d1bb51010fde20/soviwijeruxi.pdfIn PDF document text
    • http://bukharasuwanee.com/sites/default/files/file/luvijuwurupoladoxabamez.pdfIn PDF document text
    • http://pk.mo/userfiles/file/tuvonavofa.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/93qobe1csg9aklsgfk7dnmj7ff/83743043939.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160c8ce226da27---koxagojagoluzedojunivow.pdfIn PDF document text
    • http://sushiloverca.com/uploads/files/desarukedisaputaw.pdfIn PDF document text
    • http://www.srijonihealinghome.com/fckimages/file/luzibusiribegapipetulaja.pdfIn PDF document text
    • https://transit-connection.com/userfiles/files/zuwoliwek.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16072519019620---liduduvikegibolij.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609813881c9b5---tevoxilofezagivomatosere.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=capitalism+socialism+and+communism+worksheetPDF 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_off0000e651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE651 11088 bytes
SHA-256: 38f704aa26c5eb54ca4e6ac776b881699c8153d2293db45a861b537070011675
font_01_sfnt_off0001000d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000D 17284 bytes
SHA-256: 1bb04ccc4aba9a89fa0c08a44939aa2301b92420428da9afe58fe4f47f562380
font_02_sfnt_off00012d0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1