Malicious PDF — malware analysis report

Static analysis result for SHA-256 49a7e6d91139fdcb…

MALICIOUS

PDF

89.2 KB Created: 2021-08-06 05:37:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 45efa55fe7e02192c840883cd38e3c30 SHA-1: 6b34e290a9df580e6b4b3d589293b28ced2a5c66 SHA-256: 49a7e6d91139fdcb10a13c4965618d27ee33c480d7898b4540e8cfe038fb0412
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/be6d48ca7f7d050c9340252bf1972004/jijevadubuwuxef.pdf In PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/dir07rtmtvcvbgiji673kbfjh3/lewuba.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/c5db7aa0072c870f6caefb11c44594e9/51591830908.pdfIn PDF document text
    • http://kubabus.cz/novy-web/upload/file/37563277561.pdfIn PDF document text
    • http://doo-san.com/userfiles/file/20210529081009.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/18717696935.pdfIn PDF document text
    • http://ambulatorioveterinariocigliano.com/userfiles/files/voruzadevuviri.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac8972a0ff---89660332543.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/3vvf9hmbadfidcl8isgtsspk9h/5385592269.pdfIn PDF document text
    • http://moiarchitekci.pl/pliki/file/jetajisoku.pdfIn PDF document text
    • http://cokhitienvuong.com/uploads/files/rabenorameresiwaserug.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a75645118a2---wexugon.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/fe165be05f7b43543aad48a5d27870c7/29873468246.pdfIn PDF document text
    • http://www.shadowrangers.live/img/files/kofinopekowizuliwo.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/162b025fa92fc79140c1267b955e7bd1/16909091784.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/53462154508.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/ae2be8a24df61da13373fc1ea41d3d7e/rezelimitukamelarile.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/80b8fce5a1e59f1b31e8a9147202b278/vimalubebobo.pdfIn PDF document text
    • https://eldorado777.ro/upload/editor/file/84560027561.pdfIn PDF document text
    • http://chpcentre.com/files/file/88663489744.pdfIn PDF document text
    • http://studiotecnicobonoli.com/userfiles/files/wazapisatasivado.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/kfb55f1q37t4t3kmhnp229ienj/nodefasobotesefoku.pdfIn PDF document text
    • http://olimpic.hu/ckfinder/userfiles/files/wunizimufosebosebow.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160713cd334a73---72924875217.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=hyena+road+full+movie+download+in+hindi+filmyzillaPDF 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_off0000f999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF999 10768 bytes
SHA-256: 146f5cd8a0104956ec37ae0ebd9e7ad0e315514bf117a746caf5276b9f031a7b
font_01_sfnt_off0001122c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1122C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A3E 16920 bytes
SHA-256: e38081e4a5a2d3524813d9ee211ee83d2bbcd021cc70b0367a7ad4e52d1efdbb

Open this report in the interactive analyzer, or submit your own file for analysis.