Malicious PDF — malware analysis report

Static analysis result for SHA-256 47da39bdac87a156…

MALICIOUS

PDF

85.8 KB Created: 2021-07-09 02:47:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0bdc5803eb8b8236c32f10ce74e46241 SHA-1: 2e34521cb1b0ae4ebbc42a31f8c5d62f59ad3e99 SHA-256: 47da39bdac87a156323892fdc95bbd1847a6c82eb3316d1146d6a8a32a3eb3ec
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URLs, many of which point to compromised CMS uploads or are part of a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded JavaScript, while not fully analyzed due to obfuscation, is a common technique for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://garglob.ru/uplcv?utm_term=meaning+of+stress+in+the+workplace
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/527b6c01091dc2f5e5ad0e346fb92af0/sokofenikalaruvamoner.pdf
    • https://cafepiolho.com/uploads/assets/nefopepikasato.pdf
    • https://xuanhongkhang.com/upload/files/vetidenaxugitiderimin.pdf
    • http://conniecorsentino.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/90333313405.pdf
    • http://houselandia.ru/files/moxuj.pdf
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/foq4rb51rn5vmppnjtjoog7gs0/20473492192.pdf
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9892fdec20---kerarubupopefisosekel.pdf
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/ff0bb07cfab10293b9c69d0eebcb08fb/fuzuvoxufukuvizofezidixes.pdf
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/ga2aqluo1l5ntp0nep4c20u1t5/74271626463.pdf
    • https://artenika.pl/fck/file/gesig.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607383f31c596---66289882131.pdf
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/pr3ms3rntra0mqfmhta1j2qb2r/navotelopisoba.pdf
    • https://cafeau1ait.xyz/js/ckfinder/userfiles/files/63280212869.pdf
    • http://skrabl.pl/www/rpbd/fck/file/fezakazixunabepisu.pdf
    • http://alfonsoguiggiarchitetto.it/userfiles/files/20649799670.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/4sd90cdnt1a6vugc24dp0v89ss/gofek.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f8ab86a2d---wivejajaneminuxa.pdf
    • http://jogamiskolc.hu/ckfinder/userfiles/files/fiwuwowu.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/ec2tnd26h72tmfsh8r9m7d9iv6/84991826457.pdf
    • https://penzionradvanice.cz/res/file/19165295535.pdf
    • http://xn--xhq021fvrwdth.com/d/files/kifunepon.pdf
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d240cf6d07d---41777749784.pdf
    • https://samarpanbharat.org/trila/userfiles/file/fuperogarapapusaniregi.pdf
    • 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_off0000ec8e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8E 16792 bytes
font_01_sfnt_off000104a5.bin
7f74e999d2d4edea0bd560045cede5ccc62d6ec3efcf36f36f72f3c3647dd81b
pdf-font-stream PDF embedded font (sfnt) at offset 0x104A5 10928 bytes
font_02_sfnt_off00011dff.bin
e366a66913662879f7f6ec35d3fe1b72728af91b4ef9d17a94b9063b0af9c828
pdf-font-stream PDF embedded font (sfnt) at offset 0x11DFF 16844 bytes