Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7af7d3373bf96d4…

MALICIOUS

PDF

82.9 KB Created: 2021-09-04 06:55:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: aa88a4175ad5233df5369ef7fce72e56 SHA-1: 5422b1d82086b6a16b8c4eac093e0fe1ea22ca4a SHA-256: e7af7d3373bf96d4c95f41ca5e2a61c0b199e8e2b708467c102f798811bedb9b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised WordPress sites and other domains, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a common PDF-based lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://winstar-tools.com/UserFiles/editor/file/78802646529.pdf In PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/1ae929d0d70645fb840c6e09c95fc366/fakolumiv.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/gapekagaj.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/aep8gog4rlsnmls2auai6clug7/lunegetirogekulifud.pdfIn PDF document text
    • https://servauto.fr/img/user/file/27670590701.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0030220068---xanob.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/16106faf5c88bd---ruzafifa.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ddbc724b135---48412941138.pdfIn PDF document text
    • https://biserica-izvorul-tamaduirii.ro/files/11339843120.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d92ce64a9e0---45184613573.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/166b8154edbdf686840136e3d1493242/8931431459.pdfIn PDF document text
    • https://www.wemservice.com/ckfinder/userfiles/files/livokozofexiximepewobov.pdfIn PDF document text
    • http://polyalpan.hu/_user/file/32836173777.pdfIn PDF document text
    • https://mm-podium.ro/userfiles/file/69998152846.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160cbc689d248b---78904010648.pdfIn PDF document text
    • http://familiegravesen.dk/ckfinder/userfiles/files/gilazewitepiketekasi.pdfIn PDF document text
    • http://kutyasturak.hu/images/files/19535360451.pdfIn PDF document text
    • http://bona-agra.pl/Upload/file/32335287577.pdfIn PDF document text
    • http://bagumul.com/file_upload/spaw_upload/file/20210607160708.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/mn9eejgi0ajfpjq0onfdpk4v93/vakobasepowe.pdfIn PDF document text
    • https://jvlegacyhomerepairsmd.com/nbloom/fckuploads/file/62299094946.pdfIn PDF document text
    • http://purofirstli.com/userfiles/files/vipirimununize.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/zoxuwokalurinuj.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/10186803053.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160be3c3dbacc9---12836601864.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=astm+particle+size+distribution+pdfPDF 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_off0000dcf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF1 18508 bytes
SHA-256: f0c8edb7446e72e15e8e034b55cf2f7eb7b9a20cea82ce9cd1a1b18ec050dd7b
font_01_sfnt_off00010c70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C70 11064 bytes
SHA-256: 0911cafe91c000106d60553b9e3a913c089e87304a26c79430f7cc9403e87ba4
font_02_sfnt_off00012601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12601 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.