Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfe46451965b3d4c…

MALICIOUS

PDF

82.9 KB Created: 2021-09-06 21:06:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5bc7d2c083b3ae896b6190da9e013818 SHA-1: 2cd91897244b7b8af24d9a79ebf0c93f3838883b SHA-256: dfe46451965b3d4cdd117d04b123997fd7694e86cceb263698c9746661d9adbf
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, a common technique for executing malicious code within PDFs. It also exhibits characteristics of a link farm, with numerous URLs pointing to external resources, some hosted on compromised WordPress sites. These elements suggest the PDF is designed to lure users to malicious sites, likely for phishing or to download further malware, aligning with the ClamAV detection of Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://coretry.ru/uplcv?utm_term=whistler+680+tri+band+radar+detector+manual PDF link annotation
    • http://thermcom.cz/userfiles/file/geduxusid.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/19f0ce26a2c8b63cca961709ec1b5ed7/fevovakoxo.pdfIn PDF document text
    • https://0a3exp.com/upfiles/editor/files/32581615213.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608017eb6cee2---78786550407.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/rorabufo.pdfIn PDF document text
    • http://hourinkan.net/js/upload/files/79898139971.pdfIn PDF document text
    • https://umutisi.com/umut/upload/files/noxolobuvugifotusidinerot.pdfIn PDF document text
    • http://cokhixnktientien.com/Images_upload/files/jekuvi.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077df05dc069---66592336332.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b99d55bb615---mejirig.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073241bb6fc6---91034024422.pdfIn PDF document text
    • https://art4you.sk/editor_uploads/system/files/62601825735.pdfIn PDF document text
    • http://www.celso.org/download/50407521660.pdfIn PDF document text
    • http://burchiellati.com/file_fck/file/nugumamaki.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/38360946389.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f9d7951ca---64666001482.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/1a40bf5631b529f53763d23d3117f3eb/lefobezaxu.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/813a1af2fab0265c876aeda21ec8bfb6/56890384135.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/6ebeb45363c4737427d20536bf901aa1/92401321640.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/lezovileladuz.pdfIn PDF document text
    • https://vydavatelstvoklett.sk/userfiles/file/56777079481.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608139164581d---77836583769.pdfIn PDF document text
    • 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_off0000d743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD743 11364 bytes
SHA-256: 6dd49b5de05ea944ca98997d08fbfb87e355a0e0e3cf05202a8d9a2ed1d6f553
font_01_sfnt_off0000f1d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000109ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109EA 19428 bytes
SHA-256: b6fe8b90f160c5c0d8a4ea81cb545761b5a51ac7c3ca6288a644f435bd437019

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