Malicious PDF — malware analysis report

Static analysis result for SHA-256 60c2ce96dfb60b62…

MALICIOUS

PDF

77.3 KB Created: 2021-09-02 16:04:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: dc5b084aa9731e3f0b268cee101fc000 SHA-1: 1e7ad69218fc2f9fbd57b0ba4162500a101c284e SHA-256: 60c2ce96dfb60b623f354c8b1a1fdd5673405afe1985e81cf1fdfaa6105569fc
204 Risk Score

Malware Insights

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

This PDF sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress uploads and disposable hosting domains, suggesting an attempt to distribute further malicious content. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, likely facilitates the execution of downloaded payloads, aligning with common phishing and malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://www.whoamiandwhyamihere.com/ckfinder/userfiles/files/4498099704.pdf In PDF document text
    • http://cathyourhair.nl/js/ckfinder/userfiles/files/63847797023.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/16071c46829c63---kipupikewi.pdfIn PDF document text
    • http://fornacedelia.it/userfiles/files/tolilesuponurix.pdfIn PDF document text
    • https://laetitiabernard.fr/images/file/vogiralabefubokevusewo.pdfIn PDF document text
    • http://artistalexanderkanevskyroyalshakespeareglobetheatrelondon.com/clientMedia/file/bidowisofudavodaroxig.pdfIn PDF document text
    • https://elbag.net/wp-content/plugins/super-forms/uploads/php/files/849986564b63e5a0f51352f6a47d6157/waduduviliboj.pdfIn PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210806150950.pdfIn PDF document text
    • https://pratham.one/file/babawuwurusexiruj.pdfIn PDF document text
    • http://didopack.com/files/konorirunelasugubovatiza.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd68499174---12366375903.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dabcce768c---76848819626.pdfIn PDF document text
    • https://namkhoasaigon.vn/web/images/files/jasigajudurumitofumoro.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/ta4fknrl9ptpc3q3accb4hkt2j/xovefozabubomumusabawuj.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/i8b6u7uivjkh0e86ldk050tv80/wuzetalifoxesakidogizodi.pdfIn PDF document text
    • http://oilmachineydy.com/d/files/2278025513.pdfIn PDF document text
    • http://maternites-catholiques.org/ressource/site-image/files/77888610775.pdfIn PDF document text
    • https://photojet.bg/userfiles/file/gilofem.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/fdjfi3aobah3u8prkcq7ejtjm7/61889812854.pdfIn PDF document text
    • http://megaprestige.ru/uploads/files/bawitekoxuwejusuf.pdfIn PDF document text
    • http://nhahanghienminh68.com/upload/files/doxuwid.pdfIn PDF document text
    • http://nonstopsushi.com/uploads/files/89160195169.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16086f52349d88---33203563784.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e932edf562---bulipuvesezumapike.pdfIn PDF document text
    • http://jonme.net/ckupload/files/65255692080.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=chlorination+system+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_off0000c962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC962 17444 bytes
SHA-256: 98e63dc4016d308dde19e4ec606460ec1f0dd53bbab183d074d6429a14717f2e
font_01_sfnt_off0000f6d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010eeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EEB 10908 bytes
SHA-256: 15bf9c0d409e4d6390fcc17b382517f7f0ec4890a92196249bbe180241fead7f

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