Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c069f741914c56a…

MALICIOUS

PDF

93.4 KB Created: 2021-09-07 23:20:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 72965f6e0c3cff7abb00fdcb25a8b447 SHA-1: 192f2d5a78a0cc1d39af3fa4fd27faa45eef7109 SHA-256: 5c069f741914c56a2f213b63265046c2d155ea953a4891cc77d0d1fe0d95b9b4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and links to compromised WordPress upload directories, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the structure and URL patterns are consistent with a malicious PDF designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 https://pistant.ru/uplcv?utm_term=linux+shell+scripting+basics+pdf PDF link annotation
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/c9c0eb86f4f03b52a12251909d5ae7c9/repolekuvu.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/rnbmnge3vtj0m0qbhrq2kih896/dedutuk.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/v4vmtm2u5qtucfnlmdn0tignr0/43413635384.pdfIn PDF document text
    • http://balone.net/_upload/file///zamutozowulawawidewirito.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/41119575638.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/ovnivrq44ju2p2omm305mf3une/36254557073.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703b7c4f613---36663844220.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/8060329e008826321d8b2157395cc651/toxavewotuf.pdfIn PDF document text
    • http://haciogullari.com/depo/sayfaresim/file/2872644883.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b268623c7a5---19243275746.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160837129c4d6b---verowuf.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d072024e0a---74927863756.pdfIn PDF document text
    • https://weyergans-hcc.lv/userfiles/file/3053725861.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/4cddd5039340fc7ad1b6acee3bd89922/86872241109.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/mokonemuwurazuzox.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.fr/userfiles/file/84017992365.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/97081146100.pdfIn PDF document text
    • http://ijdssymposium.eu/upload/50995889485.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a597ed3c878---89517011643.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612d81c10f710---17652845801.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/2ie6q9ah1gucojpikfhdkh47pr/fusaretunowevebopizol.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/90n4jqisl8rjamsbsi3qs6nqbu/45848879334.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f603986d49---purazobizeropako.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_off0001040c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1040C 19380 bytes
SHA-256: ca6892c3cc077efdaff197a3f9695a92b340b14365770495d8ae212d2f600cf5
font_01_sfnt_off00013663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13663 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E7A 11080 bytes
SHA-256: a68decd8c55a07c4327c6d05d498552ce8a675dc695e2557bebde043b2cfd5b5

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