Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b0dd6251dd9e00b…

MALICIOUS

PDF

99.1 KB Created: 2021-08-30 07:31:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a1cd318b75af3a93f9014db67a63a000 SHA-1: 266e8ab90cee851254c093697d27687b37b5ea00 SHA-256: 8b0dd6251dd9e00b2016765f6fd09ab5d604fd8d907ca0be4dd193657c8c68da
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple domains, many of which are hosted on compromised WordPress sites or appear to be disposable. The presence of a URL with 'download cineware plugin for after effects' in its query parameters suggests a lure for software-related downloads. ClamAV and an ML classifier also flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://bycongroup.com/UserFiles/file/3110119215.pdf In PDF document text
    • http://ergakiland.ru/files/files/gamixovafonovowitirananuw.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/lci9agqs78dc8dfe3ha96tl753/92679248841.pdfIn PDF document text
    • http://zlhk.ru/upload_picture/file/vufawop.pdfIn PDF document text
    • http://kirakuramenandsushi.com/uploads/files/mefanilivewenozotelo.pdfIn PDF document text
    • http://bongoes62.dk/userfiles/file/nosilon.pdfIn PDF document text
    • https://pasarantogeldua.com/contents//files/vodaloziwemijajawunilek.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/2bgpgtqgp4r2emrt9a083vvfus/fumelijituniguge.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/476d600cf9af904d641a24ac44de935e/gakezivorinibotabalu.pdfIn PDF document text
    • http://poketomecam.com/uploads/files/37933964484.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609edd53dcdfb---9235535258.pdfIn PDF document text
    • https://retrofitoman.com/ckfinder/userfiles/files/73999035089.pdfIn PDF document text
    • https://cortemadera.com/wysiwygfiles/file/32369743041.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098addebfa88---bujepobuku.pdfIn PDF document text
    • http://precisao.org/files/files/zafowomugebipemuliv.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/i639am87m8a2i2ug5331b3ig4g/81419865078.pdfIn PDF document text
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/94ee4groqqvr1buovbhmi54jg7/75243082529.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/46fe8c5b08e343e315020ef79f99dc59/gegotofaxikodivifewovupan.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0726df542---73010405330.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/lemuwixopotepe.pdfIn PDF document text
    • http://ideviceplus.be/app/webroot/files/userfiles/files/xegabule.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/4e57e3b63b1381b2d9b51b9dcaaf3002/66914601929.pdfIn PDF document text
    • http://www.hausbaumesse.at/ckfinder/userfiles/files/48667782771.pdfIn PDF document text
    • https://partnyor.az/userfiles/file/dixuzuja.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/metanezorabotomijifoza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=download+cineware+plugin+for+after+effectsPDF 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_off00011739.bin
c99bddc31fa0adc5f007c95154fa165d3a09cbc308e5e1c72fc93acbb8201f36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11739 19516 bytes
font_01_sfnt_off000149d8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x149D8 16792 bytes
font_02_sfnt_off000161ef.bin
56f05079674e3e86f041833e2a8193f3dd03369bb650c1eab1e3184350306bec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x161EF 10980 bytes

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