Malicious PDF — malware analysis report

Static analysis result for SHA-256 59acce98d9f53bd8…

MALICIOUS

PDF

90.3 KB Created: 2021-09-16 10:08:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 500298a6a694c5712cca29d22a1d1f4e SHA-1: f70159374fa6e78f2b585b87db71fa4ed292d46f SHA-256: 59acce98d9f53bd8625b6a11b236da94ec1aca214a0ba7d9ae6469b1eaa6ee07
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs, many hosted on compromised or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with malicious PDFs designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://shangrilayunnan.com/ckfinder/userfiles/files/xalubipajenipuxelovilov.pdf In PDF document text
    • https://alienaquatics.com/home/gb/public_html/ckfinder/userfiles/files/76308932079.pdfIn PDF document text
    • https://aymfly.com/aym_image/files/57581385140.pdfIn PDF document text
    • http://mt-filtration.com/uploaded/file/1143944872614202f4e8668.pdfIn PDF document text
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/81495637459.pdfIn PDF document text
    • https://btegypt.com/file/navoxevu.pdfIn PDF document text
    • https://i-try.tw/upfile/files/2021/09/04/38219169870.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613b92f199824---36835325425.pdfIn PDF document text
    • http://computergramm.com/userfiles/file/fukiviwamumilavarojutifo.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/80f3f9b88f5a06e29eeb38c2d554961c/tonanunasatolimuzomip.pdfIn PDF document text
    • https://madame-tina.com/ckfinder/userfiles/files/1360536889.pdfIn PDF document text
    • http://noithatsah.com/webroot/img/files/fawef.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/293054582.pdfIn PDF document text
    • https://www.adom.biz.pl/ckfinder/userfiles/files/gijiruniwipel.pdfIn PDF document text
    • https://ourlady-schools2.com/userfiles/files/10029020877.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161421514563e0---94619306921.pdfIn PDF document text
    • http://sin-hua.org/userfiles/52408022590.pdfIn PDF document text
    • https://melnikhouse.com/userfiles/file/lulitevobanaru.pdfIn PDF document text
    • https://dbmotorbrokers.com/userfiles/file/muvadijajerodop.pdfIn PDF document text
    • http://bestbelly.org/content/files/files/31180338470.pdfIn PDF document text
    • http://dar-tom.pl/userfiles/file/fuwepanorijupowogo.pdfIn PDF document text
    • https://ecodiagnost.com/ckfinder/userfiles/files/laroluwimudurolomuwiz.pdfIn PDF document text
    • http://photou.cc/ckfinder/userfiles/files/61897606115.pdfIn PDF document text
    • http://globalcenterhotels.com/bot/ckfinder/uf/files/lotapewupe.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614139f2820db---87884591467.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=cinderella+2015+full+movie+watch+onlinePDF 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_off0000fae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE6 17596 bytes
SHA-256: 71cc7653522aeb455bc8e320fc838919129619aacfdf73e1339cd1b5f6df09f9
font_01_sfnt_off00012822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12822 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14039 11284 bytes
SHA-256: 7e6663c7c86b55b6699789b61706c09ef4f5a7004a3eac07681fedaff6aee537

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