Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c340617f25aeda1…

MALICIOUS

PDF

87.4 KB Created: 2021-07-30 06:46:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fad398ccc6915d02f4d41e49ef06417c SHA-1: e2875410194fe0d7f9bc98fedcc4fb15f2c04149 SHA-256: 0c340617f25aeda169f7798faec08d1d1840fc162f8265c70f05adf339615e78
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm heuristics point towards an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9883

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://homeopathyhongkong.org/files/kopepanusavil.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160db06f95579a---poreriwimezoti.pdf
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16091c5de04af2---fagozomanurajumemow.pdf
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/kvf27e3tc5ut762tt7sk0fv2gh/20867030371.pdf
    • https://evergreencans.com/userfiles/file/lofin.pdf
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/6694b922f441177429eb679cee48999c/bididebuna.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb58506b35---memupelarisituzoz.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16092d05d498cf---27481170074.pdf
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/b2e82a3e3dd9339046815d7c60cfad8e/2272180084.pdf
    • https://cdmsig1.com/ckfinder/userfiles/files/zubekovakewawitufola.pdf
    • http://dashoernerboot.de/userfiles/redobabomovedutuvur.pdf
    • https://agermag.ro/mm/file/budufixu.pdf
    • http://samrayburnclassof1980reunion.com/clients/873185/File/52021987078.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/5fd1a8a49a30552c0de7318e67a82777/mozijul.pdf
    • http://bawaconstructions.com/editorData/file/xazava.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/8edbc383ed0c7145cff3c9eb44d297df/wotivaxawibopuduluxerik.pdf
    • http://www.halpellet.hu/userfiles/files/28107519084.pdf
    • http://flooroverstock.com/admin/userfiles/file/90146042489.pdf
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/2o1aceudllii963pppusk4tonb/75040969124.pdf
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606eaf4af2bfe---gitujiwudezowab.pdf
    • http://jlm-kg.com/uploads/file/pakalaripuxofenafem.pdf
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160dd8fbd7e99e---rabiwiwafejejipeli.pdf
    • http://dzbnf.com/upload/file///jujisuvujoseletodinagu.pdf
    • https://galedo.cz/www/data/cms_files/files/favanamegapijo.pdf
    • https://krassimirtaskov.com/userfiles/files/depuwunumuxepas.pdf
    • http://massvt.sk/editor_uploads/system/files/21841259813.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=how+do+i+reset+my+tempurpedic+remote
    • https://www.youtube.com/watch?v=WOynvdkGoX4
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0c9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C9 16792 bytes
font_01_sfnt_off000108e0.bin
b72aa94cd9b82c6bb69f4a22a56515ed919a3148d9f65f4410e2df39b038caba
pdf-font-stream PDF embedded font (sfnt) at offset 0x108E0 10656 bytes
font_02_sfnt_off0001215e.bin
f7aebd4ba492d2784b3264463c45696e4ae3d10f1062d7ac6b3449b439536e6b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1215E 17212 bytes