Malicious PDF — malware analysis report

Static analysis result for SHA-256 022689060ebb5eca…

MALICIOUS

PDF

92.4 KB Created: 2021-07-08 03:45:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 064ac851b4fb38300c75bd80362124a2 SHA-1: 5d14d9131f6b43c846bef0870c9f9735a9e263f1 SHA-256: 022689060ebb5ecae7d7cbf086e2c9db5373d675396bbccd2c80d2bdaa51f593
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. Additionally, numerous URLs were extracted, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites or download further payloads. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://oniceh.ru/uplcv?utm_term=anatomical+regions+of+the+abdomen
    • http://spreewaldatelier.de/img/editor/file/24542455382.pdf
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/00f49fa929bc2b8b121babd9b0f4ea1e/venes.pdf
    • https://mexico-airport-transfers.com/ckfinder/userfiles/files/tejixobizorosap.pdf
    • http://officinedesign.it/userfiles/files/38203178359.pdf
    • https://ceccarbotosani.ro/userfiles/file/53802109472.pdf
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/vibobibipezajowofedizi.pdf
    • http://studiogiovannone.com/userfiles/files/rukunokizizu.pdf
    • http://slphs66.com/clients/e/e6/e62fa13cff665df70d7481f632b33819/File/27543454427.pdf
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/6uufjek4o051mnu698vmp9904m/tejuve.pdf
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa5e33a541---2594017933.pdf
    • http://historia-bfured.hu/userfiles/file/27827786766.pdf
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/lfhltnsjstuungqglhgbtevhmi/75412092472.pdf
    • http://forter.vn/hinhanh/file/45683083927.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079485a6274c---zatesaridifojazuvin.pdf
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/fpdhqv7mciicnmsedpnla05lsb/73419097622.pdf
    • http://emirates-offshore.com/uploads/image/file/64046880362.pdf
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/5327168f8082105fa7ad8afb2728f652/ronewuzodedajize.pdf
    • http://naplesredeals.com/userfiles/files/51581690639.pdf
    • http://motoren-adachi.com/js/upload/files/20173093723.pdf
    • 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_off00010698.bin
d3d45b3653bb1efea5f84d6413935a64302212992fb000f632a596e87f120dcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10698 17132 bytes
font_01_sfnt_off0001337f.bin
98256ce53f2a1d1ad8964b9b1d7b3b8e8e55c2e63e7754849c2d1310e18b8769		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1337F 11044 bytes
font_02_sfnt_off00014ccd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14CCD 16792 bytes

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