Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c0c7fafb0b2cdf0…

MALICIOUS

PDF

83.3 KB Created: 2021-09-05 03:25:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 49cb344d79f05653744c2ed8418860c3 SHA-1: 678f5dcd0a26e356e135836ca82e7abf2d94869f SHA-256: 1c0c7fafb0b2cdf0498a5a5b38b7ce39344ac9724ea70b3e83fa9abe7acbf25f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF containing embedded JavaScript, which is a common technique for executing malicious code. The PDF also features a link farm pointing to numerous external URLs, many hosted on compromised WordPress sites, indicating a likely phishing or malware distribution campaign. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6cd6eacaca---77515874763.pdf In PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/f30d0e7c34015847496b7d4523d69dbe/miwaredotebep.pdfIn PDF document text
    • https://chachachat.info/js/ckfinder/userfiles/files/dumumorodupadi.pdfIn PDF document text
    • http://commissioncollectionlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/96252405494.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/33e7438731303ff9a19086a16e025b69/kagodasepatadubelimixajuv.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021062602505973499.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609103b101ea9---31430425381.pdfIn PDF document text
    • http://pampa.be/uploads/userfiles/files/20429685319.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/24926707066.pdfIn PDF document text
    • https://davaocarrental.com/images/file/pesamujibikukesitewegav.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/demaxepotegugemosafatulaj.pdfIn PDF document text
    • http://dokturmice.com/ckfinder/userfiles/files/sebalirikolo.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609cfb66992be---zofusogitag.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/49890713498.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/4e22829fdf632023c8eea89a9a7b18be/wasoxofozajolalejevinunet.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/rekifavolusabefafoxexa.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/8fab82ecfc86d2a574aca2f3600f6223/fomixefalegixezug.pdfIn PDF document text
    • http://servmed.net/userfiles/file/wavobuped.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/ea50413280d11c92604bd1600655f278/fopevapidikerolefopojux.pdfIn PDF document text
    • http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/sejumegiwalofep.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/80899382165.pdfIn PDF document text
    • http://cjandjunemillerfarm.com/clients/75830/File/dobiwivezepanavunesikaz.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/630eb2a9d301f16e4eb1b0a5f2efc7cd/mudadoxufumowezexipu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=romeo+y+julieta+pdf+libro+completoPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/33f8bf257ec4bef2ec6eb7518b5ea37c/zanifawosurunatifan.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_off0000dc6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6B 11036 bytes
SHA-256: ca7cb1cff040fa0d6dc3774e407c425038f5a1a6a42facec7bc009aa5a4aaa61
font_01_sfnt_off0000f5e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E4 19388 bytes
SHA-256: b7ef59ea86f4b5c652306c67cc55be36c9080453fdb342a510f19bc368367591
font_02_sfnt_off0001274a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1274A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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