Malicious PDF — malware analysis report

Static analysis result for SHA-256 be620ba6131787e7…

MALICIOUS

PDF

91.8 KB Created: 2021-07-08 11:19:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c069231afc46959651ced68876ddccbc SHA-1: e29bf1324a9506cbc2abf2f6b309b627c60f53f1 SHA-256: be620ba6131787e7cca2fd1a53f8d1da2e404f10cb56735881a363d00e2be5a1
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous heuristic firings indicating it is a link farm, with many links pointing to compromised CMS uploads and disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it is designed to redirect users to malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://philabc.ru/uplcv?utm_term=sangria+with+seltzer
    • https://mimpishio1bet.net/contents//files/28617143764.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/ef2ab639e2fc084a2a4cbecd315d3174/mabapulinemapizoxerarig.pdf
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160791418c367a---25460599680.pdf
    • http://alexandraharris.com/clients/36054/File/lawujomozixijusedo.pdf
    • http://fatamorgana.fr/uploads/assets/file/menarizuwol.pdf
    • https://aimara-bg.com/userfiles/file/jomijaluxawol.pdf
    • http://isagenixmakessense.com/ckfinder/userfiles/files/sibufapaboxunino.pdf
    • http://files.ibiza-ferien.de/file/vasifarapemusogasawirane.pdf
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160737f5b981a0---gasepara.pdf
    • http://archifolder.com/userfiles/files/bepomik.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16078b0e0ac2d1---36263019796.pdf
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/i3noedim871nt75uv1eukusk97/jowopadinozapaleje.pdf
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf7dba7b4c---24979089397.pdf
    • http://aristosaigonhotel.vn/uploads/files/62208056558.pdf
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f562667f1a---tifevu.pdf
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/hpcm066hgm889p6n1625t6p310/8979670000.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160b8204b4bce9---71051209817.pdf
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/29c49649f85f38578dd81df639fb0644/fumesop.pdf
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1d69588b7---85717825042.pdf
    • https://mimpiindah2.com/contents//files/puvivixaxoloramikifo.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea84.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA84 16792 bytes
font_01_sfnt_off00010295.bin
88a5f3ad9079b2340172ecd64f1cd79ba1ad1753eb2b73e58de10c5a7be67d15
pdf-font-stream PDF embedded font (sfnt) at offset 0x10295 16340 bytes
font_02_sfnt_off00011888.bin
15f90b105b9f0834c884eec8598688a761ad7f37f40b4ed82faf0575b2ee8b43
pdf-font-stream PDF embedded font (sfnt) at offset 0x11888 18784 bytes
font_03_sfnt_off00014a04.bin
e013d5c55cfd59eb4190a80636c828e798a86a2997e1611f937b3422b6e1fa74
pdf-font-stream PDF embedded font (sfnt) at offset 0x14A04 10488 bytes