Malicious PDF — malware analysis report

Static analysis result for SHA-256 06f637fd7bbae735…

MALICIOUS

PDF

85.6 KB Created: 2021-07-17 07:11:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: afc0f20e1d986a426f5af7a23146d24e SHA-1: a0263747b153d1d0e32e5b8d30fa8d44521733bd SHA-256: 06f637fd7bbae7355c2fefb269fe7d4e8662f3301ebfb045e9301dfef88e5ee0
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 malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lead users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/05c3f393ffd631545a6c83411726ca3c/romorexujemekikowopopul.pdf In PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c78276563---zuzomimojaler.pdfIn PDF document text
    • http://bronia.org/userfiles/file/kanalepewome.pdfIn PDF document text
    • https://hpsoft.shop/upload/files/xagejaxozun.pdfIn PDF document text
    • https://www.retake.dk/ckfinder/userfiles/files/73528427792.pdfIn PDF document text
    • http://beautifulmoda.com/userfiles/files/19442654908.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/82739383924.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b9e4e58b701---xetejulezodat.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdc37443eb---fufiletexe.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/r3d1j4j2ivugn6d5sk4eaja9vi/futofozemek.pdfIn PDF document text
    • https://avonsteel.com/UserFiles/file/25634525064.pdfIn PDF document text
    • https://dodatnagarancija.com/userfiles/file/pupafizidiwotape.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/51770413771.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/7543d2c9e25010fc4c30a234d2049351/mazigenaximemol.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/531c48ed013eeafec6dc5adc3ef009cb/98027517071.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c8dd7d0b1b6---50693518000.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/9df36c791b0ac1b7cfb1b3ef00aea122/20510163870.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/9af355a6646e7ee83a95b06ab5209bf3/27877759517.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/0400c3182523ded3199fd0d2d3eba310/tetadulojepod.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160737a782c3ce---wujazipuloledoze.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/99e31cfdccc373f211af3ec3d2dbf0b8/lixarokij.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/1aa545dd55821174239cdab4fb78f96f/difav.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ae5e408a5---32773230232.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/gemufinegarovo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=harry+potter+deathly+hallows+onlinePDF 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_off0000eb6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6C 10680 bytes
SHA-256: 823b199f03bc1ffdda54dad3de06aec7a2fc0166ebea0080fd25a0c0e1c88a15
font_01_sfnt_off000103e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011bf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF4 17232 bytes
SHA-256: 3d6145a6e7b97108b75ff7f59ca0297bfc4c998396a01634dff63b26c34c99f6

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