Malicious PDF — malware analysis report

Static analysis result for SHA-256 74b66b551286cd7d…

MALICIOUS

PDF

81.8 KB Created: 2021-09-20 16:32:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3c3cbec6a32cac716e5a882a1f2c04c9 SHA-1: 2957f567a3d2a8564a67779d86ca00840bd3bc9e SHA-256: 74b66b551286cd7da8b77ff3486730597249d11b0cc3fe42107ada578f63caf1
156 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, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The embedded URLs suggest an attempt to lead users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://somersetcountybar.org/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/9644794928.pdf In PDF document text
    • https://ihappywash.com/uploads/files/202109102056412640.pdfIn PDF document text
    • http://xn--q20b13r9leepaeb.net/upload/file/202109160320458677.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/134fc1e5fed08810561c0d547d353fed/14406258211.pdfIn PDF document text
    • https://gesema.com/UserFiles/file/detujezividojegaxidajoro.pdfIn PDF document text
    • http://khiconghoixuancong.com/Khicong/admin/userfiles/file/jipetefolekaxuborarol.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/79057750925.pdfIn PDF document text
    • http://to-tuong.com/media/ckfinder/files/5894624559.pdfIn PDF document text
    • http://gr-chem.com/upload/files/4129213723.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c8d05eedb0---givozunumoxuvifigete.pdfIn PDF document text
    • https://senegal4d.com/contents/files/92525929671.pdfIn PDF document text
    • https://abogadosaccidentealicante.centralcms.cloud/galeria/files/56240035623.pdfIn PDF document text
    • http://ltpbetel.ro/userfiles/file/78707024671.pdfIn PDF document text
    • http://ricoconsultingattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sutedorilavowotapexona.pdfIn PDF document text
    • http://madinagirls.com/easydo%20v2.00/files/uploads/rarodi.pdfIn PDF document text
    • http://pure-chiral.com/upload/files/25680646367.pdfIn PDF document text
    • https://monyetjoget.com/contents/files/rerunozorigibun.pdfIn PDF document text
    • https://nguyenthelong.net/userfiles/files/2228851825.pdfIn PDF document text
    • https://franciscojaviermoreno.com/DocsCKeditor/files/nitidanej.pdfIn PDF document text
    • https://vico-domrep.com/ckfinder/userfiles/files/93225015143.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/6d004d985eed04f4017038cc68ec2765/wexexuzimafavit.pdfIn PDF document text
    • http://studiogallerani.it/userfiles/files/zagabupikuwil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=my+phone+signal+is+not+workingPDF 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_off0000d8f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F5 10816 bytes
SHA-256: 41279b5743775040282c4aa8af15c684cc16c5a7dae9eaa11ea836d2904c7b68
font_01_sfnt_off0000f1f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F6 18140 bytes
SHA-256: 2d89d25aed7ec4fda0a8bb96770827373205d26eebb9f4d4db45f6211a8bbcb5
font_02_sfnt_off000121a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1