Malicious PDF — malware analysis report

Static analysis result for SHA-256 627072715c03ffae…

MALICIOUS

PDF

79.0 KB Created: 2021-09-14 04:23:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0f0fbc1def03e75df84561b969f9d496 SHA-1: 5bdc844cb3a9d106b9ef78d12b707be33cd40878 SHA-256: 627072715c03ffae83a830fd5b3f737c45a8b7879d172a3043b91b9983fff1d9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to various domains, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/0e58004ff8a86fd426c9a64625c74eb1/gotevixumuveterili.pdf In PDF document text
    • http://veitali.com/upload/files/42953487939.pdfIn PDF document text
    • https://callmarkinvestments.fortunekenya.com/callmark/files/xesotabirezulopiladu.pdfIn PDF document text
    • http://abovomedia.hu/_user/file/ziwokegijanoxidovuxesa.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134c457ae21b---biminamese.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/numonosepevudopad.pdfIn PDF document text
    • https://barrierball.cl/ckfinder/userfiles/files/75580106762.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/161344f10eb965---69919942395.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/b3u16r9l8loiom6i51e47vageq/37558130380.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613896dfb09c5---foluxenitimolunixabu.pdfIn PDF document text
    • https://jaukiaplinka.lt/ckfinder/userfiles/files/goguruxumasakoroniv.pdfIn PDF document text
    • http://elitacasa.it/images/file/tuzavaragakuroxu.pdfIn PDF document text
    • https://takipbizde.com/calisma2/files/uploads/monitix.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/bobakejorezigalibaxan.pdfIn PDF document text
    • http://puntolinea.org/userfiles/files/bemamar.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/39717e49200821a3b37c16585d4f651e/91963446520.pdfIn PDF document text
    • http://papinchess.ru/userfiles/file/32000162203.pdfIn PDF document text
    • http://xsteelstock.com/d/files/68335375991.pdfIn PDF document text
    • https://rosewoodcity.org/nbloom/fckuploads/file/vogekamolu.pdfIn PDF document text
    • https://haciendaloscipreses.cl/upload/file/63113465476.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/b761pldfqbrthku4np5n8uep8t/90151058720.pdfIn PDF document text
    • http://acrclubinversores.com/files/galeria/files/bijetabudewuzut.pdfIn PDF document text
    • http://upsshop.ru/ckfinder/userfiles/files/fukebekewevifunon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=change+google+profile+picture+on+androidPDF 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_off0000d0ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0ED 10864 bytes
SHA-256: 52226663547e967531e7375f6be470cb0882011a209fd49541887c1ff8eb3f87
font_01_sfnt_off0000e9bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BD 17124 bytes
SHA-256: dc459cddc17306d99d0cef787ec2df4a37a014929017c71858c644ed7808c6c4
font_02_sfnt_off0001163f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1163F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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