Malicious PDF — malware analysis report

Static analysis result for SHA-256 04494f585cc0beac…

MALICIOUS

PDF

77.5 KB Created: 2021-09-13 03:56:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 997f32172770fd1c36566d4feb65511f SHA-1: 2cefff88b7aab3f71a2b0a68abd3eb55d66f815e SHA-256: 04494f585cc0beac7640ff71f66152af3a9ade38edd87f1214b17d8a69f34b50
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting it functions as a link farm. The embedded URLs and the PDF structure strongly indicate an attempt to direct users to external, potentially malicious, websites.

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 http://yuanyoujie.vip/userfiles/file/16793837010.pdf In PDF document text
    • http://palaciodelosnavas.com/userfiles/file/58446832411.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161379f18d7750---gezomegokifotivibipo.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/71679492206.pdfIn PDF document text
    • http://camel-republic.com/media/userfiles/files/96076371278.pdfIn PDF document text
    • https://aquarell.ro/userfiles/file/busajalogiviseba.pdfIn PDF document text
    • http://cathugo-yachts.de/res/wysiwyg/file/bopewivaretorojijabinop.pdfIn PDF document text
    • http://manenshop.com/upload/files/raxaboxawivutibet.pdfIn PDF document text
    • https://refakatci.net/userfiles/file/2127495898.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/hn6hbri0bu3tjcsl46pum781ul/kesedavazuvaje.pdfIn PDF document text
    • http://roletyhanarol.pl/files/file/pulejuni.pdfIn PDF document text
    • http://www.siphonicflowmandiri.com/upload/files/mipodigobulevotugudoga.pdfIn PDF document text
    • http://aven.su/userfiles/file/10976491415.pdfIn PDF document text
    • https://fertilizergranulatorprice.com/d/files/nikadepemufizekowin.pdfIn PDF document text
    • http://xn----7sbjvweekof5d.xn--p1ai/files/files/nuvegegupitapuk.pdfIn PDF document text
    • https://mar3ol.com/Files/files/53807687164.pdfIn PDF document text
    • http://dejede.com/userfiles/file/67439274460.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1613a3f7798748---89220590555.pdfIn PDF document text
    • http://haiannweb.com/uploads/files/vulomexizefodopagaraj.pdfIn PDF document text
    • http://serenetour.com/image/upload/File/lemaxujin.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/161374810e2d44---lurazevejisakatevupizosij.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/c25d2661796013a2b45d3bab1eef65f5/72710128965.pdfIn PDF document text
    • https://cuichi177.com/uploads/files/202109041900147292.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/82105605785.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=rise+of+the+new+world+order+pdfPDF 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_off0000cc59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC59 10564 bytes
SHA-256: abf8ce0e60efeb2b46d81fb52ee5e9d0e5686db70a09cf9bb3cb5ac032c208ff
font_01_sfnt_off0000e464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE464 17008 bytes
SHA-256: f232596ac205002db649410c61537962f0b31aac31407ae953b185bde92651d8
font_02_sfnt_off00011096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11096 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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