Malicious PDF — malware analysis report

Static analysis result for SHA-256 45d49a944e8f7265…

MALICIOUS

PDF

88.6 KB Created: 2021-07-09 03:34:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 52cc1c381e8116b9f8f0d0234630594d SHA-1: fc6bdb56db82b75ec74bba01ec2ca43aab95b274 SHA-256: 45d49a944e8f7265b19d15a483658765ff449bda94bc2b0fa505167ddd0345d6
164 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or trojan delivery mechanism. The document contains numerous links, many hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious content or downloads. The presence of a 'download button' lure further supports a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pistant.ru/uplcv?utm_term=example+of+pentagon PDF link annotation
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607541b923e03---98298199503.pdfIn PDF document text
    • http://jdhs77.com/clients/58520/File/15375021449.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/471c4bb9ed9a42cd4ce84a258e6fc57b/8831450241.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608745df2edc9---82067936317.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/dbf4e732118bf8697c7a09e3d3d2a610/xifemikofoj.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16071916f11ce9---90222747420.pdfIn PDF document text
    • https://stonebuild.bg/f/uploads/files/27815003557.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/16089606771.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/f08e03b9504e423e808b6f695e7af34c/tofavobapenireresa.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/e2ff783e72fd6131f95df328637a11e3/wozax.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160814cd01eccf---fosezoxawenodasovun.pdfIn PDF document text
    • https://dbmotorbrokers.com/userfiles/file/66128885879.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/a9ecc0ad60ad1347719a2119bdbd0499/mokexibufuxuzozowezubo.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/5c26ee77d25513939f4bcfd26c2d3cbe/50315497040.pdfIn PDF document text
    • https://termocasasrl.com/file/85778755789.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ce36bdb9361---lurugakijezapi.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/71c25f3f59f38c088861c20cc388f536/daduzipasugepajeliligof.pdfIn PDF document text
    • https://asi-filter.pl/files/file/veduwudinor.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c8aec9d99e5---2258739013.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbb5aa3d73a---savixilululivoven.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d545ab73d---48107196567.pdfIn PDF document text
    • http://insureacompany.com/userfiles/file/58765410521.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160be918941d63---pubobutiwafojul.pdfIn PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/55450803373.pdfIn PDF document text
    • 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_off0000f7b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010fca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FCA 17548 bytes
SHA-256: ca7f8192e395eaf1b0cfdc92ee659b3807902ad36901d680fbf7b925ee709846
font_02_sfnt_off00013db8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DB8 10428 bytes
SHA-256: 9cf693def1342d7492d92165d520b903e4c772add8382a63fec604cdbbaad246

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