Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d969b2124688624…

MALICIOUS

PDF

90.8 KB Created: 2021-07-13 22:55:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 2a498abac063b643156dabdc994d7651 SHA-1: 5380be5c556d8a37f1dd30cbf5e6222cd4e47ee3 SHA-256: 5d969b2124688624b975abb48fa5fb017e062b943aca080af10595d7542189db
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9866

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 https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607863c479969---369531064.pdf In PDF document text
    • http://taiwanglassgroup.cn/userfiles/file/5856867871.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1608c828f295f2---kudakevewasowefiruzuno.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6e5d10af1---13904879900.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/29f71a315162b4cc21fc2d3530ae61ad/najewobumebubisevevuxe.pdfIn PDF document text
    • http://elesud.it/img_pagine/file/72934770832.pdfIn PDF document text
    • https://thefencedocumentary.com/adminfiles/file/gigipatagibikezipug.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/f1307aff25cbbd5c3c667e4e4ee8d872/fitadexojolizepulagig.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fffdc0b6b6---31646771596.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa89692642---pidigozu.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/67233918900.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/e45a31571b688885a629646508ce1c8a/sojimofalafaze.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/begikipud.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/bapuaaofogco0tmal5mfl5afi0/81394596807.pdfIn PDF document text
    • https://charlesstreetvideo.com/userfiles/file/12045019868.pdfIn PDF document text
    • http://drthchowdary.net/userfiles/file/80668890009.pdfIn PDF document text
    • http://firmen-bekleidung.at/userfiles/file/34838326542.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/topapezukajubuvuze.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/c7c270cd2b472b12cc2ac5349fa52335/97982469504.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609472c7afc0f---purukirosubepi.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/tepiwafosonaviziroli.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/903310c176cec1711982de178c2519d0/wakavimenijunulov.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a60b4599e35---dafixasusarapida.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=meaning+of+merry+makingPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD287 3132 bytes
SHA-256: 14a73baf6b94c286ac5fa7c9e383a28c828b709f2e372137234be062aceea990
font_01_sfnt_off0000df6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6E 20348 bytes
SHA-256: 6d9f79c84a0201f239b09461a79b109df612ab8637144db992d55e84dedc239f
font_02_sfnt_off00011331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11331 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00012b48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B48 10444 bytes
SHA-256: d6256c5725577a1dcfca6d008ad0ada3b3b4fbb802a16ac57a19b4fa5dc5e12d
font_04_sfnt_off000142f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142F3 17352 bytes
SHA-256: 7c9b17a70004c33892f54e604594ebe9b45474b9d4151ba535d3f840a02f8cab