Malicious PDF — malware analysis report

Static analysis result for SHA-256 c82292e441395237…

MALICIOUS

PDF

86.6 KB Created: 2021-07-26 14:57:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: a4c9ef71c8ec5f87d4a23efcc990d50b SHA-1: 208c7faf18a89f1fadb7328e4e1a445dde355302 SHA-256: c82292e4413952372e3021f633297f8fc3aebb2fc003abaa0b31adc00df49ce6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple URLs pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to deliver a secondary payload or phish users. The embedded JavaScript is a common technique for executing malicious code within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://baschin-heizung.com/meineBilderAlbertGrundschule/file/sevutadoputatetanad.pdf In PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/d5bc91f30220939906ef92c966430792/52819897837.pdfIn PDF document text
    • http://bukvoznaika.ru/ckfinder/userfiles/files/mimubekukosa.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160788f88822ed---96107218074.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/4135e2cf01f89b0d7d3013a393094d7b/xovozurazunezokuz.pdfIn PDF document text
    • http://mywymc.com/userfiles/file/37669022955.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16086bc5cb800f---jofemef.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b12e165b2---fezegixopoxebizititudidi.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a6614b62bb0---9034341832.pdfIn PDF document text
    • http://teifsepahan.com/files/file/xolemifojokiwamato.pdfIn PDF document text
    • https://pasarant0g3l-turbo-h1t.com/contents//files/53716475882.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/eed32017bf9a9c1981c73e8fb37534eb/wejibuz.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021050321325611.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f9ec5232b1---satepamuworulasasenab.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160f595848a5f7---90683467908.pdfIn PDF document text
    • http://supair-lux.hu/ckfinder/userfiles/files/55956530205.pdfIn PDF document text
    • https://galerieportelouise.be/userfiles/files/lunesira.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/xetixezimotupubuxopikom.pdfIn PDF document text
    • https://memoservicesrl.it/file/suditiwipumawe.pdfIn PDF document text
    • http://sincaremedicaltour.com/js/upload/woxipuberuwimoseb.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abfbb84bb95---40350652549.pdfIn PDF document text
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/30141091817.pdfIn PDF document text
    • http://donghobaoan.com/uploads/files/fixawusixofoferividu.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771925da7fc---67376111604.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=watch+wonder+2017+full+movie+online+free+dailymotionPDF 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_off0000ee69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10680 11276 bytes
SHA-256: 700c32ee33a918e46e54b9ff7395771141ac682d35853dde8269f7562198f383
font_02_sfnt_off00012100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12100 16596 bytes
SHA-256: 5b0c5f5b8ce487bd169bcccb81bbd6bdf497b8f52e344f0289f9c55f79589794