Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f45f4c82393fb44…

MALICIOUS

PDF

84.1 KB Created: 2021-09-03 21:13:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1a62179df53f2fb6f04c617b8fdcfcb7 SHA-1: 93f8e5b851370005d8241f8b2a57bbc8ba82423a SHA-256: 3f45f4c82393fb44f36d1f126c266486d6d5918d4c4c35f097baae9847d8fe0a
204 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

The document contains a critical heuristic for a 'Clipboard command execution lure', instructing the user to copy and paste content into a shell. This strongly suggests an attempt to trick the user into running malicious commands, likely to download and execute a secondary payload. The presence of multiple URLs hosted on compromised CMS platforms and link farms further supports a malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://rhondadejean.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/12403232894.pdf In PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/9fa826e05108549d5c38e95de74de9ab/63806519386.pdfIn PDF document text
    • http://solarexperte.ch/fckeditor/editor/images/file/jisopake.pdfIn PDF document text
    • http://niengrangchuyensau.com/upload/contentFile/file/50904359125.pdfIn PDF document text
    • https://mytalk7.com/_UploadFile/Images/file/pazemovil.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/16077523b841e0---jirebefitavipawutitogaxir.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/l7ck9bb1a5netuim5q4jltt3e1/feledorazufapoval.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/soloxizojudozigasidomoboj.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/qi7k11l1r4gbnbu72ept0t1if6/motuz.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/f36a353da975d40b8c76c61f63e96f44/ruvotadijixipa.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/l2jl6rr7ic4k6pcbgl9jdt2ef6/46824735380.pdfIn PDF document text
    • https://volnynaklad.cz/data/file/jinanimonaxofokilewejo.pdfIn PDF document text
    • http://mintaialuminum.com/d/files/ridolokogidunoredet.pdfIn PDF document text
    • http://travellightnepal.com/userfiles/file/20521653069.pdfIn PDF document text
    • http://capesociety.ca/uploads/files/9496818304.pdfIn PDF document text
    • http://sistarelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/poduwijisokibodaredag.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/0ccfe0529054c9d0737dbaa1a4e8e4c9/zuruvu.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab04b790aa4.pdfIn PDF document text
    • https://sabunwangi.com/contents/files/nalefolasadizukizawim.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607276801000c---96433960386.pdfIn PDF document text
    • http://espokebar.com/uploads/files/43683938318.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/d4f5e1593ad2494c0da7e262b703d49b/24517939282.pdfIn PDF document text
    • https://zanhotel.ro/beficientconsultingFiles/file/lozix.pdfIn PDF document text
    • http://premium-h.info/files/files/78362167054.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/kgv0ahon7p6ggk5rpo1h67rv52/bawipuwimegiribepifuvatik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=git+cheat+sheet+pdf+gitlabPDF 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_off0000e2c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD7 18312 bytes
SHA-256: 3f965a93f3f715cb84624546d84ee991b7b66d88bd436ff34a17aaec0b6adbed
font_02_sfnt_off00012a1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A1E 10756 bytes
SHA-256: 35278eaf729b1e9e3f153fe92f2b4baa315e73e5e19812c75305d1c36ff744d0