Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c67e4d63807e562…

MALICIOUS

PDF

77.2 KB Created: 2021-06-30 19:44:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 75301b280223acc19167520afba8936b SHA-1: b949c847c3269b52bf06cc40d7ac0da5b46bf208 SHA-256: 7c67e4d63807e562693a4a0487a5b391b9a48f0fb1f497c0d148d8b195ab75d1
156 Risk Score

Malware Insights

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

The PDF contains a link farm hosted on multiple compromised websites, designed to trick users into downloading further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing or malware distribution scheme. No scripts were extracted, but the presence of numerous links to potentially compromised CMS upload directories points to a distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c844bec384---zodotesodemeve.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac97503a70e---27025254927.pdf
    • http://bogelaipigeon.com/upload/file/zagisekivukudoxesora.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160706bf9bb513---kodedusufetijixapi.pdf
    • https://motacademy.it/file/bazilaxetodusasovifezez.pdf
    • http://guojingmall.com/userfiles/file///fekokutogawunavode.pdf
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c88f3dbace---marawuxavumarelem.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/49d1d0ed6b1f3a396b410721e5416777/54732207090.pdf
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/7ea21da9999c1cd55c1531238b911a46/bixigod.pdf
    • http://livinglearningandworking.org/clients/e/e0/e05af8355f71d8da3aa90f500b9284b3/File/3885290439.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ab727c0d8e6---18945027454.pdf
    • http://akinmedical.com/uploads/file/54908648346.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160906c4e13f4a---susuluzizujulipugadab.pdf
    • http://upoart.com/ckfinder/userfiles/files/fofikevevofojinuwaribe.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b0834309c---59645335415.pdf
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/7jq10rvf7t9qvlbp3sj94ehvcf/futivat.pdf
    • http://k1a.ru/images/files/file/kadorofunezajekika.pdf
    • https://ludifrance.fr/userfiles/file/xaxafapiruzasajag.pdf
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/ef63dc033f5c9564e66e7e717231eb19/91093685621.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ba9f3000c---badosewosokup.pdf
    • https://sieuviet.net/webroot/img/files/dewumefuto.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed41376164---timiwowokaz.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160836ecd5adc7---fefimiduboxepirod.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160884e9b088a5---mopimujidejukixefaluken.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=pop+up+cube+template+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_off0000ccca.bin
d365f7b3a9c827c9bcafd3822bc1ede2bbf56808d46a7eb74b45ea69abe154f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCCA 16408 bytes
font_01_sfnt_off0000f78e.bin
9439c3948becc2913d2f840e97010f2d3e4c2e1fd326b25849976b91f28f5ac0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF78E 10556 bytes
font_02_sfnt_off00010f74.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F74 16792 bytes

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