Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b59ee9cfb6de923…

MALICIOUS

PDF

92.6 KB Created: 2021-09-02 10:05:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a89b6ddc32cc45444d9f8e6cd1e2bf4d SHA-1: 6f39e67ffb712a35e73f23c4ecd1d0bf59ad328c SHA-256: 3b59ee9cfb6de9235a3ebbe5ace91d96eca7ddad7a61f22084ecbc1efbf44619
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress installations and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of multiple compromised CMS upload links and disposable hosting reinforces the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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 http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/8perm74op309qrtqk0kilgvs40/galewibutepimopu.pdf In PDF document text
    • http://rapet.hu/files/834180984.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/65qkvhocddl535fukcdo0m4enl/18916132715.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/blqfajvt0n9kdvbjcttbc95cb0/28631971012.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a15ae9c0e3e---96018559922.pdfIn PDF document text
    • https://jagamimpi.com/contents/files/84719868342.pdfIn PDF document text
    • https://studiopros.com/userfiles/file/In PDF document text
    • https://africanresearchcenter.com/userfiles/file/dikowasaxuvekowenima.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/7878f7b68a9ae4995d8373cb28504596/tawuraxusibigiraram.pdfIn PDF document text
    • http://tetobox-budapest.hu/uploads/files/jikeligiti.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/tabezijotajetatopuk.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/34198309698.pdfIn PDF document text
    • http://thietbixanh.net/uploads/files/povetodeletoredagoni.pdfIn PDF document text
    • http://interiorconsignments.com/media/file/59841581072.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/83c446e0433ec420f194f1091f3ddcb1/28025743179.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/gojizufi.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/5a89578724b15a1384a2c896aa4cc5eb/50907957758.pdfIn PDF document text
    • https://cafesca.mx/ckfinder/userfiles/files/61934434565.pdfIn PDF document text
    • http://daegyung.kr/userfiles/file/20210825030942.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/93919644436.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1606d52eca2158---31728883860.pdfIn PDF document text
    • https://giustofiori.it/file/56268332173.pdfIn PDF document text
    • http://officeharbor.com/pdtInfo/tamaxododafanuwom.pdfIn PDF document text
    • http://huerural.com/uploads/image/files/wuvajaxujafitavezadu.pdfIn PDF document text
    • https://autotronics.vn/userfiles/file/85105208204.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=personal+advisor+servicesPDF 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_off000102d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D2 10332 bytes
SHA-256: 4f010db306ca4b8dc1a94dfef0797d99aa6c8c1c4ba6c916e9ee74ba23fbc45d
font_01_sfnt_off00011a3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A3D 19052 bytes
SHA-256: 6178d1f4b85b4f712ce823028aa506a89bb4e7545c1be99756802387a3bdf921
font_02_sfnt_off00014bc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BC5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1