Malicious PDF — malware analysis report

Static analysis result for SHA-256 207a9eea5e2a33da…

MALICIOUS

PDF

80.8 KB Created: 2021-06-30 04:38:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 608e9936fa4321229b2f93891127cb21 SHA-1: bf88294b6e0519a0d3d046bbceb372494a7a8601 SHA-256: 207a9eea5e2a33dabe6a0bc433cced96f06a7ddcc8c6ba4e337eea426f6e8167
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links pointing to compromised websites, indicating a phishing or malware distribution attempt. The presence of multiple PDF link farm heuristics suggests a deliberate effort to obscure the final destination or host a large number of lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 https://ketchas.ru/uplcv?utm_term=how+to+view+multiple+pdf+files+in+one+window PDF link annotation
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c12603f24---67770040326.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/a1f38b7bfa0d04e3277a842c3e250f45/59104857730.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/24409210884.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/xutesukowadegiwedepow.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861fb713f68---84973196452.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/60103649346.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/4abe61f02d8a128f36972047de5ed5da/lugevuwilewidaroxegemov.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/9rir0pjqej7ad2lhl6b55mn6l1/bexosasiwixolubuxulak.pdfIn PDF document text
    • http://yngc.ru/admin/ckfinder/userfiles/files/zalozobus.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/e770819dc002337e8fe21a7f2ba881b3/4019664830.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/sbirr54dasbebil8nkh38t9t3b/28519504032.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c090ef94364---89145640781.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/4vk88gh5g4s9b43tbju9aehlu6/betijageworirixelujelet.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2de28c8a3a---mozowesivajawetatari.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160803736d6004---38878678514.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/icu48g45igc3ffpoevdn74eegh/sulubadolalufinu.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b42c10149df---xigodewevimemoverupixumi.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/074d68880a869f56bee2d7e09e12054e/zikakemijedepuwajuzagexun.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c488b18a45---82214748983.pdfIn PDF document text
    • http://fdscience.com/UPFILE/userfiles/files/11516919842.pdfIn PDF document text
    • http://hkacca.com/userfiles/mufijatupofoted.pdfIn PDF document text
    • https://ngoctraithaibinhduong.com/uploads/news_file/34621550333.pdfIn PDF document text
    • https://ubranni.com/uploader/files/fuzavigakulip.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_off0000d977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD977 16852 bytes
SHA-256: 9ba39d94f720b9918e0d858b259b81b43075a88aa2542cc1ee0d4082b6b283b7
font_01_sfnt_off0001054c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054C 10640 bytes
SHA-256: 6597f3e13927681ecb888e4c9c55d22fd88663ccfbef45a5d015fb7c4da0f55b
font_02_sfnt_off00011da8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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