Malicious PDF — malware analysis report

Static analysis result for SHA-256 4943ddbf65ae7c00…

MALICIOUS

PDF

72.4 KB Created: 2021-05-07 08:53:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a0ae0adbdf5ee6de68b96e0d3fd837e SHA-1: 1f5c73663e0951b9e12468b8a3cf74b795841916 SHA-256: 4943ddbf65ae7c0090f1fe9192cb546b2d99cb45d2e040079c7263f89ca3c7b1
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely used to deliver a malicious payload or redirect the user to a phishing site. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to exploit users by masquerading as a game download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pistant.ru/uplcv?utm_term=battlefield+2+bad+company+android
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/6428c4d69bd0cfb6166075e27ee87742/zovex.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/1fbb45aaf6a3f40e29d125b2007eb6c8/83440775553.pdf
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606edd3b076ae---75004538169.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/d039822bc900b8b2edb2be2371dbfcec/1262782445.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083d012ee1c7---gexojezijudosonuvejur.pdf
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/ckpm0g0fpgelreljp8s1c33bu4/vodulasasunedawugojisi.pdf
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/203f7f1c69ce7bdbc357c9e4cd63daa4/wapivosojanika.pdf
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/peomgs7lukmj165b8inl8qdonn/rigodakugalijedawuva.pdf
    • https://cursosgratuitosonline.es/wp-content/plugins/super-forms/uploads/php/files/u7ag2ntj01uu5omfba6ifi67fe/66599628146.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f35ddce1c7---fuxosalibos.pdf
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160768102c4ebb---61396848398.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16082aee94c191---49573072377.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/rk5n9fmspif652vdl61v9iqvr5/kumobovi.pdf
    • https://gofropack.com/wp-content/plugins/super-forms/uploads/php/files/84a31d061ac43ccee1b67044ee9ecb5b/mokugevixikose.pdf
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/4c40d24c8ca2c325e2c9444d8b2e0ead/58670232381.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d167.bin
0b8f90bdff0e4ed6e1c0324ea7ba6ca1b4836a5f486899073d7035f9487392ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD167 5544 bytes
font_01_sfnt_off0000e437.bin
69e9d3dfab1fb031f3d8885d748f3579d634edb7241bd3faa8aaee65977f3138		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE437 15224 bytes

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