Malicious PDF — malware analysis report

Static analysis result for SHA-256 e02afeabc15329ff…

MALICIOUS

PDF

76.4 KB Created: 2021-10-09 17:03:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 775f54596f11cc10009872b0a61d123a SHA-1: d3f9c9399ede43afed0f67da6fbf41e55004f4cc SHA-256: e02afeabc15329ff4a9dc1a0378b71722633a62e191ad4f832c862f676353b9c
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous links pointing to external PDFs, many hosted on compromised WordPress sites or disposable domains. The primary attack pattern involves a link farm designed to lure victims into downloading further malicious content, likely a phishing or malware delivery stage.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://huntic.ru/uplcv?utm_term=happy+earth+day+images PDF link annotation
    • https://medbillings.us/lightspeedweb1/file/siwiro.pdfIn PDF document text
    • http://silver.jo/ckfinder/blanc/files/78633044819.pdfIn PDF document text
    • https://lemonsport.sk/upload/file/11934671518.pdfIn PDF document text
    • http://sportservistocik.cz/UserFiles/File/wetawetinide.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/c04a3315ecc6c6c0dd1cad5803f78f42/92630257989.pdfIn PDF document text
    • https://www.wroclawmodelshow.pl/ckfinder/userfiles/files/mujepufaw.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/gozumujetusudov.pdfIn PDF document text
    • http://gibisch.info/files/files/8702071572.pdfIn PDF document text
    • http://getampedmag.com/ckfinder/userfiles/files/dowok.pdfIn PDF document text
    • https://goldenlinejsc.com/userfiles/file/58960176405.pdfIn PDF document text
    • http://xn--hh0b97d8is16e.com/userData/board/file/37680947695.pdfIn PDF document text
    • http://akpanlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rozikezil.pdfIn PDF document text
    • http://ambulatorioveterinariobubiniregini.eu/userfiles/files/37997226211.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/f6e38e9fead432e9f07926d0879a61be/warazijiraporinamuf.pdfIn PDF document text
    • https://maintogelonline2.com/contents/files/11631912581.pdfIn PDF document text
    • http://lavalnerina.com/userfiles/file/tigalegalalegefikurimufu.pdfIn PDF document text
    • https://linlinline.biz/js/ckfinder/userfiles/files/sisobojaboxuriw.pdfIn PDF document text
    • https://nutritie-metabolism-sanatate.ro/app/webroot/files/userfiles/files/bejedadozukinimime.pdfIn PDF document text
    • http://cokhihoangvinh.com/uploads/userfiles/file/35810020793.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/7501f6b92a2d3df582a77cf8ba0623e3/8057116739.pdfIn PDF document text
    • http://bbfrontedelmare.com/userfiles/files/kevoteniwale.pdfIn PDF document text
    • https://slotpt2.com/contents/files/52020502807.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615288a28cc76---kepetited.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/18336282649.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_off0000c103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC103 19868 bytes
SHA-256: 38191ae36fcd765a8a8d492b4d40ea5cb1b94c3c789e373189fda3c3701fab12
font_01_sfnt_off0000f41b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF41B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010c32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C32 10672 bytes
SHA-256: d0e7b170960dd8eaf1812b13cd665bbc3094a2f78e62eed52ff51ffe9d34f0f1

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