Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e8e03cf74d5a6ca…

MALICIOUS

PDF

132.0 KB Created: 2021-06-27 13:07:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d41bec0db2326489f2dfe9ea6eacfa24 SHA-1: 70d03703e7bbe32152a7824a449617e619903d58 SHA-256: 1e8e03cf74d5a6caa2188d9aa67e59c5beabe7be3d02c0968ab3989a59e5523f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other disposable hosting. These links are likely intended to lead users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9845

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://bisnismedsos.com/userfiles/file/60064576478.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdfc76c4c16---22141195053.pdf
    • https://brahmagnanam.org/fck_uploads/file/66178718461.pdf
    • https://telewebmarketing.com/FCKeditor/file/mazojavoribezamidolinilo.pdf
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/ae35837cc944b45504e9291dbf7245e5/68977542065.pdf
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/f2534013b6b42316dd449900398dc552/lasexadax.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1d2931edc---71941375687.pdf
    • http://brightwayconsultancyservices.com/userfiles/file/82826145561.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/8jj8mmm9hfd5b3mmnljf9i05l3/zejazed.pdf
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/iken976efcl0sb31ifdf5d9r2d/musarewoviberizidefa.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/588c76cc96d8d2d4f76e287fda7d53cb/32259909821.pdf
    • https://kudamatsu.org/userfiles/file/44320229509.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb1b9e347d---sozigimexawerasokumekokas.pdf
    • http://sumnerclassof1976.com/clients/4/49/49b54eafcc86ae0c30eb104ab8b91c7c/File/61901890125.pdf
    • http://tsradviseurs.nl/mailing/images/photo/file/venokedaxerodukuwirure.pdf
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087acdcb4ced---zawawiragoxujutipepaz.pdf
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d85286de68---munetozuziw.pdf
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/82510902bc12b6aed097d655e409de65/delabobegefonatowofeno.pdf
    • https://citytrafik.nu/images/file/petupof.pdf
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/lokadb6rr33st6g8sbmcj7kgdq/65353998160.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/3793b66bbea46fc1496eb5ee6952611e/fanomunajoz.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/77f8f184a5a201b1d443645f0031a97f/zivomutulun.pdf
    • http://asckhn.com/acskhn/userfiles/file/wamobemonana.pdf
    • http://akgikorea.com/file_upload/fck_upfile/file/gibarubomavepubori.pdf
    • http://tai-yang.tw/taiyang/upload/file/nolanalejelinulapas.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bde3f37db66---32141313103.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=sternothyroid+muscle+function
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019f69.bin
8080675ef99c3e3c5a3c63e57c2ca5f58874f7079015d0b3ea4431121cef30ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x19F69 10868 bytes
font_01_sfnt_off0001b84d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B84D 16792 bytes
font_02_sfnt_off0001d05f.bin
095fc1ba2c2ac3e206dedcfe29bfb4908318ffa4247d1e452230b0d27db6a523
pdf-font-stream PDF embedded font (sfnt) at offset 0x1D05F 18496 bytes