Malicious PDF — malware analysis report

Static analysis result for SHA-256 eae5af49e72ae5e0…

MALICIOUS

PDF

82.2 KB Created: 2021-09-17 04:19:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1754ba93b95ce795a4d8f6aa332c4525 SHA-1: f3d8b01e80eea82fba270e98f161c5b2f704255f SHA-256: eae5af49e72ae5e07d8991f8314cead8f99849ad021d28c25af18583ffb7d6b3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a significant number of external URIs, many of which point to disposable hosting or compromised CMS uploads, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or initiating further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/71415306181.pdf In PDF document text
    • https://4of100churchstreet.com/assets/media/files/26235030073.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/jaremigozu.pdfIn PDF document text
    • http://maryalo.com/userData/board/file/kofoguxobores.pdfIn PDF document text
    • http://jgbt.us/pds/userfiles/files/kodotalemanovesefafeluk.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/neguzerarulerivi.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/43fec71717f1622459a54acd7e4ac1ba/renilikatojabilanudu.pdfIn PDF document text
    • http://placc.info/up_image/48492073412.pdfIn PDF document text
    • http://puisan.ru/uploads/file/tibozipowi.pdfIn PDF document text
    • https://daquin-ferriere.fr/userfiles/file/kepadedaz.pdfIn PDF document text
    • https://bikeid.net/ckfinder/userfiles/files/15680050338.pdfIn PDF document text
    • http://hoangnamjsc.com/upload/files/76580671389.pdfIn PDF document text
    • http://tufaghanafc.com/js/ckfinder/userfiles/files/dunaxuwosowugatisujumujo.pdfIn PDF document text
    • http://manisafar.com/basefile/marcosafarir/files/fuwamidelapideroxizi.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/75c31c4f869b26f33b629e0dfb096947/padutuluzomalovum.pdfIn PDF document text
    • http://waterlootour.com/FileData/ckfinder/files/20210911_34EC5ABC0CB23081.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/xemefarotisoti.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135bc3eb1ad1---suxalaw.pdfIn PDF document text
    • https://mkontakt.pl/dat/file/pubiresusoluwupoloxib.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613254df6fe91---59716537613.pdfIn PDF document text
    • http://fosterfreezesantarosa.com/uploads/files/68159092891.pdfIn PDF document text
    • http://rowerowaszkola.pl/imgturysta/files/83956249003.pdfIn PDF document text
    • http://sklenicky-obchod.cz/web/admin/fckeditor/userfiles/file/wafunavawunaxuninezirip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=x+war+clash+of+zombies+hack+downloadPDF 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_off0000d191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD191 21052 bytes
SHA-256: 8526cbb261906dd3e403c5411c823418bbad2786c300091781a6d2cbbab73eef
font_01_sfnt_off000109a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A2 11028 bytes
SHA-256: 54b551943c6880834f799e9ec7d1882baa1587e5a11b877034fbe03d059dab2f
font_02_sfnt_off00012326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12326 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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