Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d0297673316efe0…

MALICIOUS

PDF

97.5 KB Created: 2021-09-07 19:34:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8db0d2c9a778154f0347b984c0de9c6f SHA-1: fd960dc2a8e55f64a85d1e8251a11e7f874a89aa SHA-256: 9d0297673316efe02e165f3c201b1a78187b3d6f31eaab7b40536cdf97b7f73a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or redirection attempt. The document body is heavily obfuscated and appears to be malformed, further indicating malicious intent rather than legitimate content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

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://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608012f67194b---20139958028.pdf In PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/42607751860edfff51a24a.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/0eo3ugc51d5vl37lhi3ble09pb/sodijalubosaxusero.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160c9234f31775---wefiniporenajeg.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/84070846701.pdfIn PDF document text
    • http://hanart21.com/files/userfiles/file/kukapavokejipuzilov.pdfIn PDF document text
    • http://hasdeu.md/data/userfiles/files/matoxemabuvinunarogosa.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/19111541634.pdfIn PDF document text
    • http://breakevenpoint.pl/uploads/editor/file/pabezazalejukesen.pdfIn PDF document text
    • https://laptoptranganh.com/data/dulieu/files/gewikedi.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/vafumijogosabotixu.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160cc8f6b827f5---pegazadudisek.pdfIn PDF document text
    • http://pazarziraat.com/userfiles/file/80413622211.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/8e663e8a9b1e62ef546d7592be136d53/79220145171.pdfIn PDF document text
    • https://businesslife.com/content/file/mamuruniloretunojoz.pdfIn PDF document text
    • http://digilit.ir/basefile/digilitir/files/mesepiluxululurenudivuge.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/bje37jgvchl5b9gevbmt05v88h/kizomobax.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fd7d69394c5---40363099446.pdfIn PDF document text
    • https://triosms.com/userfiles/file/86810132259.pdfIn PDF document text
    • http://vitajeans.com/ckfinder/userfiles/files/16548789654.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/7f12046b31e7338e312c0dbc31c99c98/bumosakotivakukob.pdfIn PDF document text
    • http://cityhelps.org/clients/6/61/61afa7a028a8e04f14432b0fece6f2b0/File/wenarilob.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/4qql6v9bkmq6o3gckp5vlk5u05/bugirejojuxenewurapulofu.pdfIn PDF document text
    • http://gongotour.com/FileData/ckfinder/files/20210625_38C48CD6BCA34685.pdfIn PDF document text
    • http://blevy.com/ckfinder/userfiles/files/41960960677.pdfIn PDF document text
    • http://el-master.ru/userfiles/file/salutowumap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=poulan+220+pro+38cc+chainsaw+manualPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000113ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113ED 11220 bytes
SHA-256: ba91526e73a9f718bd99519a64e301edb90f8705e69df9d2eeb2957e4e1b8ebd
font_01_sfnt_off00012e1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001462d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1462D 18884 bytes
SHA-256: efaafaae39c71d27f04cc0b475c6be3e4078fef4f1a988a16230fb4fb3be1f5c

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