Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9d96223c2f1d53a…

MALICIOUS

PDF

84.1 KB Created: 2021-09-04 04:33:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 72abe65b4701c429a8f80877f2ac4ba8 SHA-1: d9a4823cafa4fa88653fe703de20290b8832981c SHA-256: e9d96223c2f1d53a25d86836497b8f04763491f9871b2afe0030d3fd18ee448e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised CMS platforms. The presence of these links suggests the document is intended to lure users to external sites, potentially for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://queure.ru/uplcv?utm_term=ripped+abs+workout+plan+pdf PDF link annotation
    • http://reicar.dk/userfiles/file/77762129298.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607992bdad118---jofum.pdfIn PDF document text
    • https://dehaventransportation.com/home/de/public_html/ckfinder/userfiles/files/31009454258.pdfIn PDF document text
    • https://digireg.pl/upload/7457116392.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/5dad4950c7066a3ffd00bc6b4d0a1900/15974952886.pdfIn PDF document text
    • https://baobiachau.com/luutru/files/xekabuzatodevujutini.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/3b036aeca3d051b9c551247a63aa9a87/82450127533.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3dbaeea7b8---3655331917.pdfIn PDF document text
    • http://security-m.jp/tool/images/file/kiroravuxadodonodezavo.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba8b82a27f---39540875572.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/79196126561.pdfIn PDF document text
    • http://ippon.lv/uploads/File/legokeminaporixejibenevu.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/fazegaludunadevalilugirat.pdfIn PDF document text
    • http://jatechkj.pl/upload/fck/file/82462703763.pdfIn PDF document text
    • http://musicpark-live.de/userfiles/file/julisokakodop.pdfIn PDF document text
    • http://nbc.com.vn/ckfinder/userfiles/files/51560877982.pdfIn PDF document text
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/pokazuzefuvumofobifimonaw.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/f3c798b1583e19749855009ace3105c7/kalofiravojoxexunu.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/6f738ff5cea61a63c342c8af367ce14a/17454067388.pdfIn PDF document text
    • http://e-kva.ru/admin/ckfinder/userfiles/files/juzekuzoponadugapatex.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/231189973.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2faaf838de---gafapugowitutasalozezopa.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a574d454d6e---kovojirekejevotazobosomu.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_off0000e113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE113 18260 bytes
SHA-256: a784684fef6c07617679105d6ec86bb468943f739c80bd6c06b48bd80b6b6bad
font_01_sfnt_off00011119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11119 10952 bytes
SHA-256: be6c0fd303e61cd05b1597fb648f08f7f2b5053f1c18975340644e91ab943d73
font_02_sfnt_off00012a78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A78 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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