Malicious PDF — malware analysis report

Static analysis result for SHA-256 07526589f53f1584…

MALICIOUS

PDF

77.2 KB Created: 2021-06-27 13:59:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ae218911c48c4ea841b55e610a4549d4 SHA-1: aa79ada05f4459110730da0158e9439c55aa0d40 SHA-256: 07526589f53f158473934a4f57bb6e44e38d551e0079663f7355912a816d694f
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://tradeweb.es/userfiles/file/furumanipejixozokezobibet.pdf
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/7b79068ecc069eedb8bc6a12fef76d38/sijadozitu.pdf
    • https://addsfly.com/userfiles/file/bafunulenukawowugomar.pdf
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084463b535b6---wawolewuzulipedavof.pdf
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/31e3dae7f0ebe83dfca2f075a3fcaf1a/xiviramuxivizida.pdf
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9979a384dd---kuzilaw.pdf
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16082519c23211---soketerovekegimim.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16099cfbfeb53b---zedununivizogowavuv.pdf
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a32ba7eaf5e---18693515743.pdf
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608a944b25dee---gadabosotujasaxodijesiw.pdf
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/08e682e6601285f2e9b263b93845b21e/93516517873.pdf
    • http://motorlustor.net/userfiles/file/ritopugasi.pdf
    • https://salvatoredivilio.it/userfiles/file/23693991215.pdf
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/2b0bf390313a62364ab6b53ea0b8e8a7/15566858976.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0586737f1---bokizalabuvodil.pdf
    • https://kvkumariajnkvv.org/singhania/downloads/file/41308878966.pdf
    • http://tiramisu-o.com/yamituki-n/uploads/files/10926760045.pdf
    • http://hndgyl.com/v15/Upload/file/2021682011358558.pdf
    • https://baoholaodong24.com/userfiles/file/dulozevoxi.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160a9542471778---54179570725.pdf
    • https://sportsht.com/userfiles/file/rozimurafo.pdf
    • https://linhngapt.vn/upload/files/lisutirapivoniwoko.pdf
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba28ac465fa---44976024125.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=it%27s+forever+love
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000caf0.bin
2c8472ae6e32ba55586417b98d708ee86b3a3488297adeeb1987c4e942fcc8cf
pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF0 17368 bytes
font_01_sfnt_off0000f805.bin
09e8e82219983cde078fbb10233e0497472482f25a69c04d65e0171b277b14ad
pdf-font-stream PDF embedded font (sfnt) at offset 0xF805 9900 bytes
font_02_sfnt_off00010e1e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E1E 16792 bytes