Malicious PDF — malware analysis report

Static analysis result for SHA-256 520e14904e4a3e04…

MALICIOUS

PDF

86.0 KB Created: 2021-09-08 07:35:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c95b93ced28907e532155adcd9930aed SHA-1: 2981abbd88c55743d7124338c846e555927705ab SHA-256: 520e14904e4a3e04c3deedf268075134e0b2aae131387aed2e1959018406ccb8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links to compromised WordPress upload storage and disposable hosting sites, suggesting it is part of a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to direct users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://drafthe.ru/uplcv?utm_term=medicare+claims+processing+manual+chapter+16+section+20 PDF link annotation
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c9cf197d1---29712712764.pdfIn PDF document text
    • https://lighthousemacau.com/html_upload/file/minipet.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083167b8dd7c---vefazuwugegogudemanofitiw.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/lre7qgo8q8kf0cbaib9mslnlno/7358033684.pdfIn PDF document text
    • http://csptech.net/admin/userfiles/file/25309841439.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c543f2addc---58060244428.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/givamanumox.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/o1j274j2thb5l9ai95eco0s3fs/17178284798.pdfIn PDF document text
    • https://soltendance.com/stockages/files/84340451926.pdfIn PDF document text
    • http://www.enredmail.com/templates/files/idCliente_/file/kebaxiw.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/6990423028.pdfIn PDF document text
    • http://upservice.expert/admin/ckfinder/userfiles/files/27157995468.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d84fc5173db---dafifirezavof.pdfIn PDF document text
    • https://xn--faades-mtal-n9a6a.ch/ckfinder/userfiles/files/bosipubidif.pdfIn PDF document text
    • http://daydreamspin.com/userfiles/file/32828689454.pdfIn PDF document text
    • http://spiregene.com/image/files/20210901_182306.pdfIn PDF document text
    • https://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/kexenumutojewur.pdfIn PDF document text
    • http://voijin.com/userfiles/files/jinubabobosetesip.pdfIn PDF document text
    • http://entiambalaj.com/upload/file/vazuwokudixozekamibumop.pdfIn PDF document text
    • https://mosallaesf.ir/uploads/ck/files/siminotosexore.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096e4e0a3f14---81404470846.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c27dcf6e202---42587833891.pdfIn PDF document text
    • 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_off0000e6de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DE 18488 bytes
SHA-256: b4f5d1de168a4db096d4ae594a5f963dc25746eef2b99b8dd86848c6bb16bb9f
font_01_sfnt_off00011717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11717 11516 bytes
SHA-256: 21771fcf7c76eb891be8453cbbbbb4472d83856ff5f16c178bc8d8b13039c515
font_02_sfnt_off00013206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13206 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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