Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c4e4e8db1df37ab…

MALICIOUS

PDF

217.9 KB Created: 2021-06-23 14:36:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01e11d199cfa009aa0c012220613093b SHA-1: 2ca17af13c3581dbae8bffdf9f0eb253117ce0d8 SHA-256: 6c4e4e8db1df37ab1d095437912eb02176fee6d4f1cd97e4b8db27af01489e6d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous external URIs, many pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution campaign. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of external links and the overall detection profile points to a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8915

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://philabc.ru/uplcv?utm_term=al+bhagwat+books+pdf
    • http://matstravel.ru/userfiles/file/sesoworav.pdf
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c4938de6fc5---fepavepobakeselo.pdf
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/a7a99fcc188e5817513115dffc0bda2d/53547204722.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16093a7f89bea8---zemufokaju.pdf
    • http://espacioschillout.es/images/admin/file/pigaw.pdf
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160bf198baac14---sufupeluzav.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed6d654e26---10039193530.pdf
    • http://www.gesas.it/media/mailinglist/file/28765262611.pdf
    • http://koryosushi.com/uploads/files/mowowomevagiwebogexexoja.pdf
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/3bc5a9b8cf62b0abb4a84b9f1a86e1ed/58748121788.pdf
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/fpfg5m2m5ls78qnthu1hil1rqjskuunn/wazapikavigejowovapaz.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608832d09aa5f---novubibo.pdf
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070d94ea7019---fowasekazadasivafaxelatid.pdf
    • https://topinsolventa.ro/userfiles/file/12558481585.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607fddf392b07---vokajen.pdf
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9ffe25480---tepiramenuropij.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a17f11d7783---vasusupipobujakolagude.pdf
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/a4d90a4afe67fa712fa849aa2b9ed136/11240773682.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • 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://scripts.sil.org/OFL
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002e023.bin
1092e81c990929ebbff10a5a813c7495ab9e4794b87dc5ef796bfa78bee3f2b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x2E023 5492 bytes
font_01_sfnt_off0002f2dd.bin
7e920e56b2d69ad0a34c795437496448bdbf67ad0deb23e21458005eebd3eae5
pdf-font-stream PDF embedded font (sfnt) at offset 0x2F2DD 3740 bytes
font_02_sfnt_off0002fe54.bin
364df5f4d6daed999d050123de8203fe763fc1bd373f6cec0771d512ea220084
pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE54 15492 bytes
font_03_sfnt_off00032b90.bin
4bd16c8abd39118228c1571b0005d4eb3b3e943e572fd92a2a80cfcb7b749349
pdf-font-stream PDF embedded font (sfnt) at offset 0x32B90 16164 bytes
font_04_sfnt_off000340e1.bin
ea817f51740021b92bcef70c89d52d7a51d53969eabef0b5e07cc6d68f3130a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x340E1 6672 bytes