Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5212e97b8ea2e5f…

MALICIOUS

PDF

85.9 KB Created: 2021-06-25 23:16:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 4f7a19fba7f652ed38afb91b3fe5b841 SHA-1: 9d9f0e778f321b3a265b4e78839c90d999ba6bfa SHA-256: a5212e97b8ea2e5f46cd2f8923c7cfcf861bc8c8cba78b1f4305cdcf641866f3
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It functions as a link farm, containing numerous URLs pointing to various websites, including those hosted on compromised CMS uploads and disposable domains. The primary purpose appears to be directing users to potentially malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://inwebjor.ru/uplcv?utm_term=mix+red+and+green+what+do+you+get PDF link annotation
    • http://tulsamemorialclassof71.com/clients/84987/File/nidobafu.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ae1472e7619---fiwosubuxolusutolegi.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/0a4a2a9b2615c179b1e0ba2151ec46db/jenasovuw.pdfIn PDF document text
    • http://csim.jp/ckeditor/uploads/files/wuzepazesetejaravuwuzeser.pdfIn PDF document text
    • http://zartmobilia.com/userfiles/file/20210624212946.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/36f908a5496e1d5568a650873daf32ae/tedetumutejudubutofezil.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160905662c5622---dilirapud.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/jexelorezomifipor.pdfIn PDF document text
    • http://gdbchurch.com/clients/43262/File/tadoru.pdfIn PDF document text
    • http://yasaitogo.com/uploads/files/diwefurubekenoregafewagur.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16095ac19886f2---74768482306.pdfIn PDF document text
    • http://asijskepotraviny.cz/files/file/14564928836.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a48478c5a---9139525376.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///mozulaxaxobej.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/cbbc0b499d92e316692be5d313e3f6bb/vesifu.pdfIn PDF document text
    • http://xn--o39a91gvwm83kbsn.com/FileData/ckfinder/files/20210609_2D9234A8E30701AD.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cb484035f6a---58169963070.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/e29c082c3192de6fc9978e56a1323ac4/99402991586.pdfIn PDF document text
    • https://latework.cz/soubory/kipikusezeboned.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16073f8a89de26---86172405915.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/gewagixuwov.pdfIn PDF document text
    • http://sobinco.cz/ckfinder/userfiles/files/80511098994.pdfIn PDF document text
    • http://pwr-tech.ru/userfiles/file/90899099056.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_off0000eaaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BC 17448 bytes
SHA-256: 5ff6610e2b8ed37aa2de3e435408cf65225fa83e813fa4f673187da055d9d8bf
font_02_sfnt_off0001302b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1302B 10708 bytes
SHA-256: 8ae63ff8680bb6d321e15546c9ad957296b004f8ee459eb97accaadbd9914f48

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