Malicious PDF — malware analysis report

Static analysis result for SHA-256 74dabebae37a7eb0…

MALICIOUS

PDF

76.3 KB Created: 2021-09-06 12:08:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 88f1d204c1a409dd5981babe85848b58 SHA-1: 294a231e166ba5ddf60030c75cf92259014bfd75 SHA-256: 74dabebae37a7eb0c18db4d82447eeb8bdb4a1a1763de52173a50f1e10810d6c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://inwebjor.ru/uplcv?utm_term=bosch+serie+4+wan24100gb+manual PDF link annotation
    • http://walkandwagforveterans.com/clients/9/96/96cc06f6b2a5429c1325f0b535cddba6/File/2298281148.pdfIn PDF document text
    • http://bluebirdcanada.com/FileData/ckfinder/files/20210610_6EAC537A84B5DB24.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/6a7ad3eaacd9ce1132131aef4615000d/49240529285.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/74903723478.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/uah2h9fbql5js4ikjfd75ccf4d/geperitekeramadonil.pdfIn PDF document text
    • https://vozilasavozacem.rs//files/batazajawadagitamijawiri.pdfIn PDF document text
    • https://micsys.in/userfiles/file/82715443950.pdfIn PDF document text
    • http://woorymart.com/userData/board/file/gutevuzemebidofo.pdfIn PDF document text
    • http://daieimotors.com/js/upload/files/fozatigowosebamu.pdfIn PDF document text
    • https://bibliothequeanglaise.org/upload/files/vanemoxemaguve.pdfIn PDF document text
    • http://opusincertum.it/userfiles/files/42065642622.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160aad2377b781---98199555156.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/adsek5nnl4i5ve1456dropvet4/fibokexuguworodotaviga.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/e2d8eb9c2a85df0d9695761e886a6185/8706819567.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/pt6e27iff3ukf1igc2ugj5nhvv/27505177089.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/86068237257.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/1faba0f2ae45730abc01bf4c8bf85d3c/83733979660.pdfIn PDF document text
    • http://masan315.net/board/imagefile/file/nalarematemedipita.pdfIn PDF document text
    • http://firmen-bekleidung.at/userfiles/file/93055126689.pdfIn PDF document text
    • https://damsindia.org/admin/uploads/file/wuliniper.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160734db75f229---sijiza.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/l96qp0slvthnvp189due2ppj80/50003546703.pdfIn PDF document text
    • https://ags-car.com/upload/files/35029003116.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-6-12/20210612070346268418.pdfIn PDF document text
    • http://luxe-pools.fr/i/File/bepufabogo.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c22d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC22D 11332 bytes
SHA-256: 4e5287fc243ac5921da2474625dd8c03adbb30722fbc36f1827898d16d6c482d
font_01_sfnt_off0000dcd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f4e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E8 17972 bytes
SHA-256: 420147687f7f78ada710310ea151e98ff7f93dfb889a99518f0918591a15bb97

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