Malicious PDF — malware analysis report

Static analysis result for SHA-256 573bc48c44308a05…

MALICIOUS

PDF

81.8 KB Created: 2021-08-04 03:04:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7c9b1ca2266855f56715489c25c81fef SHA-1: f6e2e686c649a2b6df774d8d848be8a0b7488670 SHA-256: 573bc48c44308a050337da7a8b0c86ec48f048af3d6191b2e83672ce513303fd
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URIs, many of which point to potentially compromised WordPress sites or disposable hosting, suggesting it functions as a link farm. The primary intent appears to be directing users to external malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6435

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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
  • 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://alliance-ic.ru/uploads/file/41574572009.pdf In PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/dea907818627ab2a9cfd4e7b70f895ae/53941354471.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/1795287c400be1e2c68dba2272451069/tisowinexamuw.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/2dbe40112b0a844c683b8d8ee029dfb8/60265840349.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/1288e68b32e5c66f251b2e53b426ffcb/soronori.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/dc4c24bd83ccb4f4c6106053e88d673e/pabifexogeloluboluke.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/13982430483.pdfIn PDF document text
    • http://dzbnf.com/upload/file///54244450464.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/56764018080.pdfIn PDF document text
    • http://nhasachconggiao.com/luutru/files/99049334442.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5c344f9bb---devaxilevasifefajosuve.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/9vj601f1u310tbnac7155cmmu3/95663133243.pdfIn PDF document text
    • http://albertopizzetti.it/userfiles/files/55532342227.pdfIn PDF document text
    • http://tcsm62.org/uploads/news/file/64285072794.pdfIn PDF document text
    • http://178.62.148.222:300/ckeditor/ckfinder/userfiles/files/moxugudu.pdfPDF link annotation
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/4ca21afa21bbf258d3d1595c46544d95/sirajekajagilo.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d669bfd5a64---93048186202.pdfIn PDF document text
    • https://faceless.me/userfiles/files/63732367177.pdfIn PDF document text
    • http://jkmdc.com/aversystem.com/userfiles/file/bukamoberewegobisopite.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/phm5pppm21k0rr41p80rfl75g4/56462900377.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/81229762967.pdfIn PDF document text
    • http://canigrup.com/userfiles/file/japixasike.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/27336794999.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d33fe7bcbf2---kutukagupirimaritan.pdfIn PDF document text
    • http://hodori247.com/uploads/files/30789440856.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=food+storage+for+self-sufficiency+and+survival+the+essential+guide+for+family+preparedness+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12435 11356 bytes
SHA-256: b6367695586487f56d93df5314004435117ad5beb9c99f5616dc357db55fd2b7