Malicious PDF — malware analysis report

Static analysis result for SHA-256 d96efe1232e978d0…

MALICIOUS

PDF

83.9 KB Created: 2021-08-21 06:09:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3276df64c944d602b2b7d8970cae8054 SHA-1: c110ce79e0020e4c673206ee14f2264bc2df58db SHA-256: d96efe1232e978d07e5eb4b2120acb56ff9caee9957aadd27a3501274a190eef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the structure and URL analysis point to a link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/0e7c8dc1b01281ebf5e12679e74c8f05/fivamixofekevivadekobonef.pdf In PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/feddnbn13h8uo6je8612m8lst5/konivinojalemoj.pdfIn PDF document text
    • http://5percent-design-action.com/upload/users/files/rorodugizasasuropem.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c11e0ad781c---sawofixuxaj.pdfIn PDF document text
    • https://suksesunited.com/contents//files/74043551609.pdfIn PDF document text
    • https://firsatpin.com/calisma2/files/uploads/23722701014.pdfIn PDF document text
    • http://www.lnk-creation.fr/upload/file/83429774212.pdfIn PDF document text
    • https://arch.ua/ckfinder/userfiles/files/98912654961.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/a477336d0ff335faf9bbc511e0c58f12/12754671089.pdfIn PDF document text
    • https://bem-sa.com/img/file/51995148611.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/8o8hbu4r07o6gtbe88lkalg2l1/67714805037.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/20217161944243967.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3d5f9d488---joxuzekamazetotijomuxix.pdfIn PDF document text
    • http://synerfreight.com/syner_upload/images/files/2646261296.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/q4b542qajda4l9ifp3kiaindgc/nomegedapujenaz.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///galutemenokowufe.pdfIn PDF document text
    • http://f-kcc.jp/user_data/userfiles/files/jonafimuzuxo.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16099b5a4b9b07---sifuxezomimamalokotorul.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/vanaxubapewisemij.pdfIn PDF document text
    • https://haysalon.com/public_html/userfiles/file/lemazimis.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607488123b0d7---304187769.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/vtcibb3pk69de79rosbh94unp1/17923544601.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/91633172425.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16092f1d4483ba---foruzodise.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=philosophenweg+heidelberg+karte+pdfPDF 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_off0000e3af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AF 11096 bytes
SHA-256: aeb3d20a6917eedbedfcde8c524ef58d034e4bc9b9915ad50705d0c342ddd51e
font_01_sfnt_off0000fd1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1E 17416 bytes
SHA-256: 76cba11e5252531f146ba7801f6e1fe48c4a1bea265f965a6a00196a088dc5f2
font_02_sfnt_off000128f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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