Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ea45a2bdf60f924…

MALICIOUS

PDF

89.7 KB Created: 2021-08-09 15:43:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0284b56a02744ef3f8b7581aea7ca5f5 SHA-1: 50595a8b701b909d14d1856186a1539a3d583cb7 SHA-256: 2ea45a2bdf60f924eb13398fb930095556cd66ecff580e48e65f57fabe518c68
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites, suggesting it's part of a link farm or SEO poisoning campaign. The primary URL, 'https://inwebjor.ru/uplcv?utm_term=1999+suzuki+grand+vitara+owners+manual+pdf', likely serves as a lure to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://inwebjor.ru/uplcv?utm_term=1999+suzuki+grand+vitara+owners+manual+pdf PDF link annotation
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/03ovkv1dlcktgu68ti27gpspvf/97145121767.pdfIn PDF document text
    • https://akemi.ro/hirek/file/17557310006.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/16085734d0dd51---gezoxirasamavubuvelilo.pdfIn PDF document text
    • http://korean-school.hu/hangul/userfiles/file/32083684288.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/4u1a1ts79m1idufe6ln6lj88r2/22162722766.pdfIn PDF document text
    • http://mottaing.eu/userfiles/files/jadirisidol.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea758805ca---30211639859.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/7a0d986ea7003853055345583648354d/todapewazitaxos.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cbf3b05e8f1---66836549788.pdfIn PDF document text
    • https://dnmpaint.com/sdcc/images/file/wixuwax.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c9eefc7a3c5---gedapidinafikagonagoni.pdfIn PDF document text
    • http://udaybharat.in/ckfinder/userfiles/files/rufidozavexomewazadaga.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/7f47357055520fc2ac75704b256294ff/81798844235.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/jqggc181llsmlq2cjpu0gjoq3o/lifes.pdfIn PDF document text
    • http://ohmamakitchen.com/uploads/files/56581477394.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609433fb2c811---tararozavulapejurar.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/361795eed06b1773048ab243e28b339e/ditovexopilen.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/007a981423e9c9bd29ee8ea59f296156/gilumagujidigifezagaj.pdfIn PDF document text
    • http://maquinandoysubastando.com/dleyes/admin/fotos/file/winowaxenerirope.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/20df4da2bcd246ce81b7e76ecc2f2e1d/guxifoxupavenitelusow.pdfIn PDF document text
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/87801261226.pdfIn PDF document text
    • http://bright-inter.com/file_media/file_image/file/26712037130.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/15404983400.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/735e1788042e040b8cd793f010aa5404/77959211621.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/c3af9f3ab64dd7266e7003fbad202d1a/zerezano.pdfIn PDF document text
    • https://toocapen.com/files/gasabudirakuvafexedatoxe.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_off0000f831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF831 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11048 11368 bytes
SHA-256: d1a48b5dce5234b901f075d9502b2e4714b668b79ea19a8a7bc7dd8c9d623703
font_02_sfnt_off00012af7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AF7 16928 bytes
SHA-256: be23e4d61438100f6c996e392957a94b40c9c3c3449a2da6e578c3b77d56493e