Malicious PDF — malware analysis report

Static analysis result for SHA-256 f60c6992b12fbdad…

MALICIOUS

PDF

88.5 KB Created: 2021-08-14 04:30:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e66c281dc04ac9b7b29cf9856fffae07 SHA-1: ae0010f7917841eb65e68c68b985291a8f3dbf24 SHA-256: f60c6992b12fbdad8ffd376ff8e85c89319429ef1edb8ea02620775fff260cdb
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as containing a link farm pointing to compromised CMS uploads and disposable hosting. The ML classifier and ClamAV also strongly indicated maliciousness. The embedded URLs suggest an attempt to redirect users to potentially malicious content, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/1a74c2d1eb5082f89e49b66fe0ee288b/xajanitemigisasenagop.pdf In PDF document text
    • http://exclusivelimoservice.com/ckfinder/userfiles/files/nuduguxipe.pdfIn PDF document text
    • https://anandamsanyal.com/userfiles/file/xutusaxuwulewuv.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607594cd5a708---36948993052.pdfIn PDF document text
    • http://kme-kme.cz/files/file/49492623802.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ddf66655d---roxivuj.pdfIn PDF document text
    • http://praxis-greve-polley.de/web/editor/files/27361602685.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160867fbd15644---70383818196.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/rijofoxibojajotilojab.pdfIn PDF document text
    • https://osiindia.org/ckfinder/userfiles/files/25057536006.pdfIn PDF document text
    • http://capitaloffice.pl/fotki/file/suxozov.pdfIn PDF document text
    • http://donghozibistore.com/luutru/files/xazorefinesikaz.pdfIn PDF document text
    • http://halaljones.com/uploads/files/18224631101.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/subibavufovigizonidizez.pdfIn PDF document text
    • http://pasted-radio.de/web/files/45475105207.pdfIn PDF document text
    • https://sanaspinler.com/calisma2/files/uploads/81975411098.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/3119c9609e050a51eeedda12b7d77c23/55081326674.pdfIn PDF document text
    • http://cokhihoangvinh.com/uploads/userfiles/file/darabozuvojeloxikuzozolo.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/d1ebbedc27d42d0e997b5aadae205793/kupipidobibumetumoja.pdfIn PDF document text
    • https://wittnebel.dk/file/fofopebegigip.pdfIn PDF document text
    • https://abhimaninteriors.com/ckfinder/userfiles/files/23086894879.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/20fb799c11a915a748cd255fde935356/33320405576.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607629189ba9e---52045078594.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/55c1e8be67958daa970f6e8d586ac37c/96149528447.pdfIn PDF document text
    • https://amthanhanhsangchinhhang.vn/upload/files/rodabakil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=how+do+i+sign+into+google+account+on+androidPDF 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_off0000f4a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A2 17608 bytes
SHA-256: f9e468948500cdaae9779dfcbfa116e13401f566aff4cc2f95c09480ef0da36d
font_01_sfnt_off00012310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12310 10720 bytes
SHA-256: 8659cb7bac8ad9b29c7ffedce5af03687bc276f47b6b94f7e8242a2d00f62b7a
font_02_sfnt_off00013b9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1