Malicious PDF — malware analysis report

Static analysis result for SHA-256 abcae6f388c71d6d…

MALICIOUS

PDF

83.4 KB Created: 2021-09-06 21:45:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b50d9d963153699ec08d97d0c510f0af SHA-1: d7a6272e5e5f95e58b17cb2331e36dd35f0d6a3c SHA-256: abcae6f388c71d6d426a600b9d856bb3ee90bee5ea1e4f1b834b8ef4b7a6cf8c
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 malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to lure victims to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://irlanc.ru/uplcv?utm_term=plaquetas+bajas+tratamiento+pdf PDF link annotation
    • https://nistd.in/userfiles/file/mupasoxelizu.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072b9bd9b4b8---42311683598.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160814f561d8b2---36758718334.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160811de79703a---dapokafujizetarevob.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b7681ad9217---29652252847.pdfIn PDF document text
    • https://shastriratanchatterjee.com/ckfinder/userfiles/files/lizugiwotiwuviroto.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/80679226039.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a2bf87126ff---44781251275.pdfIn PDF document text
    • https://rafautama.com/uploads/file/busaxoxumuza.pdfIn PDF document text
    • http://kimbuunguyen.com/uploads/userfiles/file/patijekutonawozawap.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/5c333bf38798be395865f7110d23b942/wenawojulodatifuvojikomuw.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/abd6be37dbd392e752e042cbc838a0b3/ruzeviwosatu.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-4-30/20210430143230571242.pdfIn PDF document text
    • https://xn--22ck6bdp5cach0mc23a.com/ckfinder/userfiles/files/zubelajajaxiraruroj.pdfIn PDF document text
    • http://eapver.com/upload/ckimg/files/202108231414017574.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4700fd9c8e---tamidufoxuke.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/2cbb12826271efb6a4e676dabf4cf3dc/konozixezotanodovifodejol.pdfIn PDF document text
    • http://skonasystems.com/userfiles/file/vibedetape.pdfIn PDF document text
    • http://gustosandvic.com/ckfinder/userfiles/files/mimajapawij.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/14343fdcae1fa74acc97a440f21c6806/35014177412.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/7da477d10b5a7ee142b523833206a14e/38768929550.pdfIn PDF document text
    • http://polesprogettazioni.com/userfiles/files/wasipimugonavunenebedu.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a611da7e9---neluzipipitijanovo.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/bc60ba4fe13f6aaf86438863a6570da2/gadiropagipufimowaja.pdfIn PDF document text
    • http://studiotecnicopetrillo.eu/userfiles/files/nofapusori.pdfIn PDF document text
    • http://hindel-relax.ch/ckfinder/userfiles/files/gojakapuwezanivudoderixo.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e28c4dfd1---lufovaxokilomoxuleduvevox.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_off0000ded4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED4 18568 bytes
SHA-256: 9b7b2d528754a6666b844d1ac3fc28f0613409978891ae2e24d89b4c4d9ce3cd
font_01_sfnt_off00010e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E03 11176 bytes
SHA-256: a7018f3cffbf5468a156e5190167617d3d6d5cbb379df1979f34fa589b4e5594
font_02_sfnt_off000127b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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