Malicious PDF — malware analysis report

Static analysis result for SHA-256 58bcc5689bd4f4f5…

MALICIOUS

PDF

82.0 KB Created: 2021-09-04 19:07:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9810ad9a7ca4649afe50568358325286 SHA-1: 0eea5c74a024683ffa3bfbf8fbefedff0f8bba35 SHA-256: 58bcc5689bd4f4f569ba20ef3d04dd7f104d166f30e686d12638fd0c0f17a612
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and a potential phishing or malware distribution vector. The ML classifier and ClamAV detection strongly indicate malicious intent. The numerous URLs point to various domains, many of which appear to be compromised or disposable, suggesting an attempt to obscure the true destination or leverage vulnerable websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://archism.ru/uplcv?utm_term=star+wars+west+end+games+rpg+pdf PDF link annotation
    • http://isdoor.ru/uploads/files/givamij.pdfIn PDF document text
    • https://agencement-menuiserie-var.fr/stockages/files/12114804854.pdfIn PDF document text
    • https://iwistw.com/upload/files/30141550942.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/83c36d58d4b537f39c549764d1475045/69951439414.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a67136504b7---ranar.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16114a3a5ab441---31015564850.pdfIn PDF document text
    • https://fasleh.net/Files/files/rawabinudodes.pdfIn PDF document text
    • http://noithatdangcap.vn/app/webroot/uploads/files/50099796015.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/33537826578.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/57321970142.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1609acc3583833---40583957612.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d63e3ca75---zudapojexijazedujefi.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/48a70bebcf56b12959cff38a60278bf9/ludokefinapeliwo.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/2ff708072d92ded72f219c5cb60fa93b/67047526349.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a42241355b9---48861629478.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/c01673284af00ef999494b9001da9182/kupebomebulesuziwome.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607a95aff39cc---41231526086.pdfIn PDF document text
    • http://thebookmarkcafe.com/uploads/files/lawefabukimo.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/8354dbc3f2507da3b1bfbf23d98d30c4/ropavusazatolapu.pdfIn PDF document text
    • https://barrierball.cl/ckfinder/userfiles/files/27896816630.pdfIn PDF document text
    • http://avanti-kuhni.ru/upload/files/5367388154.pdfIn PDF document text
    • http://kwiatmetal.pl/userfiles/file/badakatelidagivogi.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_off0000dd17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD17 10744 bytes
SHA-256: a626ce05325c5f0d557822369124819ee150605ede131ba72bfb86dd2cacff4f
font_01_sfnt_off0000f59e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010db0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB0 17276 bytes
SHA-256: 9c29f678626dffca4aa71e6bcb13b6c6d0b536a9fdfda4a0438b94203ac53b3b

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