Malicious PDF — malware analysis report

Static analysis result for SHA-256 e405622d0eb7b8aa…

MALICIOUS

PDF

102.3 KB Created: 2021-06-25 17:33:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e241d29c7c00b9be7a3aa136a0ff48b4 SHA-1: 5a45a972858d9860c8388b256c41c9841b544c1b SHA-256: e405622d0eb7b8aa19cba1a8d68bca5b59587b9432350c38cfd873cf891a2263
156 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The document body is unreadable, but the heuristics and URLs clearly point to a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c89095e567---rawewuwoxibubawo.pdf
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/9292d4482fcb301ccedfe05b5689570f/jigibovidejusumomide.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160aebe0720bd1---gisod.pdf
    • http://amphorabeautyclub.com/campannas/file/nofizopawus.pdf
    • http://studiocalcinoni.com/userfiles/files/7601535579.pdf
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0a4271616---26483454565.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c1b8bb5c5---75564746086.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609e00eba4bb0---31759617406.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160769a10090c5---16608179982.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1608341036cf65---83916303605.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bd976294052---23908774246.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9598e0599---44685835012.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/s8m1c98unntdojorse7c8k4hj4/64794916502.pdf
    • http://solar-makernavi.com/ckfinder/userfiles/files/85960317783.pdf
    • https://groupunsur1.com/contents//files/44695352615.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/li3jh8e67g21sn8qe02ajl1m32/suzemovo.pdf
    • http://americanpetrochemicals.com/customers/CMS-IMAGES/file/91114874957.pdf
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/ee41fff7a4275bc500fbc828420d4ef6/bozon.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/a12j56c722f5csuflgaa3o2clv/92532805847.pdf
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/21d51d0a304a37ebd7aadfa533fe416d/zapivejililoxi.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160a539b9b59ba---wetajisimuvopawaxebotafiv.pdf
    • https://skinrepublic.vn/webroot/img/files/12730284028.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=it+was+imputed+to+him+for+righteousness
    • 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_off0001171e.bin
1dc281183f880626a89a8c467c01950ec0844d05ce82af18d2afd7a24820670e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1171E 11036 bytes
font_01_sfnt_off00013070.bin
5786d7639d2cc1522a1a3889fae5b5c9fbcbd5f5c9de2f5a2930a0e54327038d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13070 16684 bytes
font_02_sfnt_off00014809.bin
a35ff9bbf0f681f2978fc0a094594bae5c66b66890f102945bca048aa4e1a84f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14809 16612 bytes
font_03_sfnt_off0001732d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1732D 16792 bytes

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