Malicious PDF — malware analysis report

Static analysis result for SHA-256 655357338395eaf3…

MALICIOUS

PDF

97.3 KB Created: 2021-06-30 20:11:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ce3e27209d4cb36e89746f1d7520b846 SHA-1: 010439eaee5ed05b8cc6f764fa517df30838c56d SHA-256: 655357338395eaf399e344b0132163455ca28e829dcc9f2b11bdb10553d73c66
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate this PDF is malicious. The presence of multiple embedded URLs, many of which point to suspicious PDF files hosted on compromised websites, suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with attempts to lure users to malicious content or download secondary payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982a676fde5---tunawafiw.pdf
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4b5d66c7cb09545c4738e37cc135dbc8/24789747007.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c95b9d5ffcd---kipagifipemutuvowefutu.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609da657dd9ba---lajelux.pdf
    • https://digireg.gr/upload/97453679914.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091f3684561f---5684932862.pdf
    • https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/43fefbd43998ae68307df51460d306bd/zejim.pdf
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/080fb1caef7f6c5ab2280dfe622b9e93/lasavimeriwimozurewosi.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16091706d30deb---39405374445.pdf
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3f4e3ba76---56828333805.pdf
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/qtbki61uc78623sf64imcmjkjo/lutepojowekoxiluteku.pdf
    • http://alarcon-v.com/editor_upload_image/file/40946640049.pdf
    • https://sieuthimayphat.com/ckfinder/userfiles/files/52643159162.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160c47f2cbb7f1---90228512524.pdf
    • http://jnnycc.org/userfiles/file/witutuxuro.pdf
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa6de84074---fowurufef.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160889777436ef---fuderuzesaxiva.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc509430fdb---boredakizanebex.pdf
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/778f8cbms3u22qti33md5g6837/44697824565.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b43f67696f8---14075237160.pdf
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160913e7146dcc---62328127682.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160729b857fd8d---22816559866.pdf
    • http://ebiocell.com/uploadfile/file///2021052800311939.pdf
    • https://brod-plovdiv.com/images/68417181012.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=miso+soup+with+miso+paste
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f95d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF95D 16792 bytes
font_01_sfnt_off0001116f.bin
83fd369bdf6c7ce3448222805a2c3d8ee4964298bb11d1e845be8e149f7e9e0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1116F 18220 bytes
font_02_sfnt_off00014046.bin
e3c25db17803dc85a5936de80f95a287b3f17e4eb02aca53ac1a0475398d0e70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14046 9668 bytes
font_03_sfnt_off00015fef.bin
b888fa115bd5254f500349c6ceddbe656a2c839c33d3d57f0013b6bb1741680b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15FEF 10448 bytes

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