Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c2e0cbfabb0bb87…

MALICIOUS

PDF

77.8 KB Created: 2021-09-06 20:30:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ac4f54015c5c9d6c467da2bc4f84e26a SHA-1: 99691e6d90f946b25a3064fed4481c5768b45af8 SHA-256: 2c2e0cbfabb0bb87de8ed589f634be10375a8e9b476d25ccfbf6a6bdf461a337
164 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous links to potentially compromised or disposable hosting sites, coupled with the 'SE_DOWNLOAD_BUTTON' heuristic, suggests a phishing or malware distribution scheme. No scripts were extracted, but the PDF structure and URL patterns are indicative of a downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://thedreams.cz/files/92022150877.pdf In PDF document text
    • http://geerhannutpourreussir.be/docs/upload/files/tikazisofewupok.pdfIn PDF document text
    • http://akgwealthplanner.com/crm/files/50394454679.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e2c7c5d8c---82691135891.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/q2jt1n7qm9sjocnbmc6hnjmge0/45844717973.pdfIn PDF document text
    • http://ceresasrl.it/userfiles/files/2689381446.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607d27868c6b3---17859264417.pdfIn PDF document text
    • http://huarui-bio.com/upload/files/38133752588.pdfIn PDF document text
    • http://mweb.cz/images/file/31251631101.pdfIn PDF document text
    • http://seattleteriyaki3.com/uploads/files/88876698680.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4c06d9900---73717053094.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/16103028835a91---56640756578.pdfIn PDF document text
    • https://doganagolosa.it/file/41356664195.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a470d6ab752---24431688250.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/f351d18a2ce72a3cebfabbd0494c61b0/nipodo.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/1c372628bf8f74fa08e9ff42d8b4c4c5/86702801683.pdfIn PDF document text
    • https://x-software.cz/data/file/virobevuxakoredurufifo.pdfIn PDF document text
    • https://sogelec-eng.com/files/ckfinder/files/7286440070.pdfIn PDF document text
    • https://chief-moving.com/editor_upload/file/kubusitol.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/12295228706.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/7817312334.pdfIn PDF document text
    • http://radecznica.pl/userfiles/file/sogujo.pdfIn PDF document text
    • https://sogelec-eng.com/files/ckfinder/files/8303923610.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=bsf+asi+rm+model+question+paper+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_off0000c002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC002 20680 bytes
SHA-256: d3ee15f83ce2d2f530b5e35d53aec83472dcd7132f8865ac7de7c6f39b80fecd
font_01_sfnt_off0000f6d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D3 10960 bytes
SHA-256: 8c2b37e2e923fd99da0700c87cfe68884896f38146d2bfa7cc9c4ca5e420ea2b
font_02_sfnt_off00011001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11001 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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