Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8abeb3c7f75c4f6…

MALICIOUS

PDF

79.7 KB Created: 2021-09-01 23:43:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 00a33d1a8aaa246da7346fb18a0b32c3 SHA-1: 541aa92652deb4ecfa18ab2e9ddcee2fe1665de1 SHA-256: b8abeb3c7f75c4f6bf54e1c7f59442fa9b5bf5fcee3061b8b5f768d3421f4317
164 Risk Score

Malware Insights

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

This PDF sample was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The presence of embedded JavaScript and numerous external links, many pointing to compromised WordPress sites, suggests an intent to redirect users to malicious content. The sample likely serves as a lure to download further payloads or engage in phishing activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/c11bc74280df40ac154a7abb99c6f705/gexiropap.pdf In PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b60dd464944---nebonenevozip.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/53461167005.pdfIn PDF document text
    • http://tchid.net/userfiles/file/xutigeji.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/6e6aaff7c0466e2e21d732b97dcd8006/49771563520.pdfIn PDF document text
    • https://actorconseil.com/files/file/nurupitudurebew.pdfIn PDF document text
    • http://dreiseengrundschule.de/files/sekojananeripo.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16082cb5b7c65d---63199960492.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/30f876353600a6331113fb5a81c060e7/medojamisal.pdfIn PDF document text
    • http://familiegravesen.dk/userfiles/file/ribitejadorasefes.pdfIn PDF document text
    • https://whiteplacard.com/UserFiles/file/30527691925.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7992a148db---28798674804.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/57dbf0cec26a908fba93f4d83a24c441/71923009619.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/nuxiludaguwave.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/pidifevadepopibog.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/5cf80f009305dcf507b715b444539501/wokomixoribivop.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/30gs0gcur1riuq4btm1osdnoo4/pililu.pdfIn PDF document text
    • http://beiwendq.com/userfiles/file/likazalomebilawaxazefuvi.pdfIn PDF document text
    • http://montgomery71.com/clients/34132/File/93172652666.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/20218152121163495.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad5f9592c08---xuborimawageg.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16083c6fcf3e95---58585982222.pdfIn PDF document text
    • http://cedule-plachty.cz/files/file/gopubimivifoginotadawin.pdfIn PDF document text
    • http://due.pt/js/ckfinder/userfiles/files/kamurizivurewaveki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=i+wished+you+the+best+of+all+this+world+could+givePDF 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_off0000d2a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A8 16704 bytes
SHA-256: 59aab8b93a89e4457838c0f21db10300701beced584d7ef25f04aa348561a44e
font_01_sfnt_off0000fd94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD94 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000115ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115AB 11108 bytes
SHA-256: d86b8b70539306d7b3f7cd9a3d419b95051b46e14f5806ef46e15a83c10746a9

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