Malicious PDF — malware analysis report

Static analysis result for SHA-256 59617a07b9411e7d…

MALICIOUS

PDF

78.7 KB Created: 2021-09-06 00:57:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: d848fbf13f01b442e8e433291982ecce SHA-1: ae1b6a28f7e9f61f77024bc1d6765fa07394fcdd SHA-256: 59617a07b9411e7d21383435383fbfc21a4d6b8bd6d70b878818bc01bea78d6b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection or download of malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://archism.ru/uplcv?utm_term=manual+de+singer+florencia+62 PDF link annotation
    • http://dmkaudit.sk/101/upload/file/51637715798.pdfIn PDF document text
    • https://t-groupvnxkld.com/uploads/news_file/40601851881.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/4tlaf2f4vmgl218h2ivsk32nsg/99321817467.pdfIn PDF document text
    • http://autosklo.sk/pictures/file/besinapalelodebumul.pdfIn PDF document text
    • https://soudurelauziere.com/upload/editor/file/mogiwazuboganevux.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160f154e7d014a---tewejodolafimaperop.pdfIn PDF document text
    • http://salt17.com/userfiles/files/pamuwowodawemubiroxa.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/xavizesirotuzixijuzu.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles//file/42616265875.pdfIn PDF document text
    • http://studiolauramoschini.it/userfiles/files/rorutefejiziju.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/40843813442.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1611c81cf0d2f2---42369942.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/8e503f9e465c0c5555284820340c2a92/zesevunisemigikasarezok.pdfIn PDF document text
    • http://geomanteia.com/userfiles/files/28372384701.pdfIn PDF document text
    • http://bienbao.net/uploads/files/57794075909.pdfIn PDF document text
    • http://samtekelektrik.com/files/sumejivoxunuboz.pdfIn PDF document text
    • http://technoauto.jp/js/upload/files/59844907995.pdfIn PDF document text
    • http://pijntherapie.be/uploads/files/99532781925.pdfIn PDF document text
    • http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/repixefanasovokomofiwen.pdfIn PDF document text
    • https://cosmeticdermatologymiamibeach.com/uploads/data/files/45966899451.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/figopolu.pdfIn PDF document text
    • http://architettosbaffo.com/userfiles/files/12353015834.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_off0000ceac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEAC 10936 bytes
SHA-256: bb358927e014011c56b653816ec88053ad9889dae489e8f7d9a9b035e83bc77c
font_01_sfnt_off0000e7ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10001 17728 bytes
SHA-256: 7b34e620f8b0037fdffe861595b45dfcd4f17bb5a3d780ee13e7e2f64e897b65