Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e2353d0ee2726f6…

MALICIOUS

PDF

90.1 KB Created: 2021-08-09 12:29:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 389ffb209cab5813ff239c47016101af SHA-1: e17be9674c1b1963782d28741088af76f1679d9c SHA-256: 5e2353d0ee2726f6c3f7c564aad5bc2aaa3b1c56aaf7ca03c2c95b6edec0a7e8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting an attempt to redirect users to malicious content. The embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986b8b501b3---5455334631.pdf In PDF document text
    • http://growourworld.com/clients/83159/File/mujubegege.pdfIn PDF document text
    • http://iltorg.ru/upload/file/tutujozavajezatujeniw.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16084ab8499241---bomegukuxuloz.pdfIn PDF document text
    • http://nano-vip.com/ckfinder/userfiles/files/dilafezorudojog.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3478dd05d3---40150993364.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/22721027928.pdfIn PDF document text
    • https://chptravel.ir/data/file/92296814630.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/4f2320fe091b126aff58f4c881fcb606/tezefezusoguf.pdfIn PDF document text
    • https://ayurvedaemart.com/uploads/file/jisogaxag.pdfIn PDF document text
    • http://mientrungland.net/uploads/image/files/58160844081.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a50d17cac10---mazew.pdfIn PDF document text
    • https://pui-vital.ro/msg_media/file/48975266371.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/39451475685.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/fd18f9713a4e0f6be93f94fdd1368f26/doparotupuvobapowitavuru.pdfIn PDF document text
    • http://marinda.ru/pics/images/file/felulovubikupuwuwazoja.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/lprv3dlbn5llblmavms2q2a2vg/ruramevovazop.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/03453fc19e97c2a0d3275611dcbba310/xiribezedofipavite.pdfIn PDF document text
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/tezogatutifepa.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a63c6efb1b---32896731958.pdfIn PDF document text
    • https://oddluzanie.net/userfiles/file/49012849311.pdfIn PDF document text
    • http://gursakaryahukuk.com/images/file/23179103643.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/c677db393abb53814ae43eb2fd7a7e41/divezatipo.pdfIn PDF document text
    • http://www.huntsvillepr.com/files/files/fomiserefub.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/lilarapekekezuses.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=is+iron+bone+training+realPDF link annotation
    • https://mediaget.com/userfiles/files/xetifezofamegigane.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_off0000f87d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87D 10376 bytes
SHA-256: 26f7ee14ed113f92b6fdad2258f321d535ebc7d70e1cd654f2d4a854c1a552c1
font_01_sfnt_off00011014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11014 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12826 19020 bytes
SHA-256: ca1f658b512596764e9a9215f380b6eb16d88c3674828205a99af3306f4de3cc

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