Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d22b42142616ac3…

MALICIOUS

PDF

85.5 KB Created: 2021-09-01 14:27:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3e1dbe216990b51df1e414b59b60e229 SHA-1: a772127809280ccf6bcf87c4f4b34a0618ca7c2b SHA-256: 6d22b42142616ac3d7e699f56c3ab960c27828704535d7044bb3d211bd8f5720
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute malware or lead users to phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1610750f8ce0be---lereduleda.pdf In PDF document text
    • http://wm-meyer.de/meyer/admin/editor/ckfinder/userfiles/files/juzimexubavovutudedurova.pdfIn PDF document text
    • https://parokisantolukas.org/Uploads/userfiles/files/14854843617.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/121uvt6g7oc30jajco1r0u7n2n/lajewokifaso.pdfIn PDF document text
    • http://gphs100.com/clients/e/e3/e3ed30f4e85b1ff1e74f61348c82e8eb/File/bamadafijokadowubaloxej.pdfIn PDF document text
    • http://www.valaisconsulting.ch/file/19584788231.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///bewesujeralugemamu.pdfIn PDF document text
    • http://esenkardeslerinsaat.com/resimlerfiles/4839701377.pdfIn PDF document text
    • https://beytarimcilik.com/admin/editor_resim/file/37283716553.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/ponulekalivikosifavo.pdfIn PDF document text
    • https://boumqueur-edition.com/upload/fckeditor/file/majopagiba.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/vegudikozuludosafi.pdfIn PDF document text
    • https://champion-osk.pl/userfiles/file/netusutepatibexubo.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160b21465d7ada---razesezarawetoperu.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16098475d66c3c---sepulafipikunojigememix.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160ac447c5b769---37150635009.pdfIn PDF document text
    • http://aimic.com/userfiles/file/milifanomatiro.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/dc9e5c4fd9e2c660310eaf1fe4fc7b3f/37841498443.pdfIn PDF document text
    • http://vattucongtrinh.com/userfiles/file/ranejojimevededazulalot.pdfIn PDF document text
    • https://wkd-uk.com/wp-content/plugins/super-forms/uploads/php/files/eb790b897d289002e189205464abe6fe/ruvodanasosa.pdfIn PDF document text
    • https://latework.cz/soubory/60193252991.pdfIn PDF document text
    • http://jfk1969nola.com/clients/873000/File/8153689015.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb17332f5c6---jivavoved.pdfIn PDF document text
    • https://avistravel.ro/userfiles/file/33620589084.pdfIn PDF document text
    • http://parvazyab.net/basefile/api203/files/dulofoxedunitasubifisixa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=personal+development+interview+questions+answersPDF 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_off0000e7a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A2 17664 bytes
SHA-256: 1de1adf4f2eebd08bbad8ebc9be824637c3588cf7cbba884b540e4058fd93690
font_01_sfnt_off00011529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11529 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D40 10952 bytes
SHA-256: ba07cf95dcdbfa5d5ee9ab6bd63a56026ef28cb86f9442c27820c30dd5299860

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