Malicious PDF — malware analysis report

Static analysis result for SHA-256 00e57c5435633b70…

MALICIOUS

PDF

86.1 KB Created: 2021-08-06 00:34:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4612ce38c154f9a59fea86dd26c4ba31 SHA-1: b0c7ee853e711fd6aba4ad7d1d3ab750934622ef SHA-256: 00e57c5435633b700f3ac431e49e62de769acdbd84ba27c27fb9f62a19393d4d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous links to compromised CMS upload directories and the 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicate a phishing or malware distribution attempt. The document likely serves as a lure to download password-protected archives, a common tactic to bypass security scanning.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://ketchas.ru/uplcv?utm_term=how+do+i+get+my+skippers+license+nz PDF link annotation
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082323c10cab---1612432993.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2b3f5602c---wakufiwojuxajudoromufe.pdfIn PDF document text
    • http://mega.kz/media/upload/files/wofuribagu.pdfIn PDF document text
    • http://sbsinternationalschool.org/sbsisnew/userfiles/file/bopijebixokerixota.pdfIn PDF document text
    • https://rcot.org/userfiles/file/70467642380.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/2eqidsr337v7ha6miakfas7ub2/64593311053.pdfIn PDF document text
    • http://buchtel1967.com/clients/26382/File/63152058933.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609691a926ce4---bijuxopisetolulaxajibap.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/loreviz.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f178eac4b---48610123744.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/mivixojogazo.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160ae9069e76c5---26607042597.pdfIn PDF document text
    • http://bloomlight.pl/_bloom/file/pagixomutoxatoza.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/96tcp1rk3h52002p8vrs091dt3/97019072082.pdfIn PDF document text
    • http://dzbnf.com/upload/file///jebexuveralotategilen.pdfIn PDF document text
    • https://dijitalsanat.link/upload/files/doxuguwosozebokujapu.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a5183792a---28809484604.pdfIn PDF document text
    • http://upoart.com/ckfinder/userfiles/files/15476254248.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/50898841135.pdfIn PDF document text
    • https://t2sc.me/userfiles/35168119350.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_off0000e9fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FC 11040 bytes
SHA-256: 96a549ea82a70d6dc9258352b6aa6f179b289bf00c7a11b83bd79ab2bb84a2a1
font_01_sfnt_off0001037c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037C 17992 bytes
SHA-256: 379d77d09009dccc31245f1318c2296f41289a579a2695401a232bdf136c9291
font_02_sfnt_off000132a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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