Malicious PDF — malware analysis report

Static analysis result for SHA-256 54993f1ad1a36eee…

MALICIOUS

PDF

97.3 KB Created: 2021-08-07 04:02:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8cd709c4fd703dc0e70f93e773509681 SHA-1: 7eef98e514d52db106a69af0969fd542b88f1321 SHA-256: 54993f1ad1a36eee92cbe827e1d14c880c0512633860ec12511ee944c91ee388
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the links strongly suggest an attempt to lead the user to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/3493219725ce892ef96694a3684d0f2d/xikefadefad.pdf In PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/vaeg62ih8on2b25d6rq18mv3td/27607161544.pdfIn PDF document text
    • http://fairview68.org/clients/c/ca/ca24e3df3ff7fa9b839de6c08aba9959/File/nedaguzofefesetoni.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a564502d834---vipirowuwifemirediramip.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/54c0bfc6d7181e0455251c12045a4ccb/58629390312.pdfIn PDF document text
    • http://mn-print.ru/ckfinder/userfiles/files/jabifi.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf1f04eb5a---20095925993.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f18882a9f4---56596256599.pdfIn PDF document text
    • http://acsalma.hu/userfiles/files/13405723452.pdfIn PDF document text
    • http://slp61.com/clients/e/e2/e296dcecfd7d10ffef0cc83fef253c72/File/37973296532.pdfIn PDF document text
    • http://xn--2vxr09c6mc.tw/CKEdit/upload/files/xopanabekopadawimudonu.pdfIn PDF document text
    • https://misbahelmudii.org/ckfinder/userfiles/files/sagapewagax.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/50188309850.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/908a1552bd16149617922ce3a065dd5c/77065696763.pdfIn PDF document text
    • https://ebooksweb.net/files/file/46176367102.pdfIn PDF document text
    • https://skatrip.com/basefile/skatripcom/files/17031247189.pdfIn PDF document text
    • http://waberry1969.com/clients/877040/File/pofejojezalukukogojuxanom.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb50a060e8---mebetamuvigurik.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/wudemejogobenokufajuw.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160b00e7528027---64290108364.pdfIn PDF document text
    • http://inglewood1968.com/clients/68690/File/36136425268.pdfIn PDF document text
    • http://tribo.kz/userfiles/File/parufajufa.pdfIn PDF document text
    • http://whs1979.net/clients/65916/File/jofagukuz.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd0a64cea7a---40323535716.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=brain+test+tricky+puzzles+level+34PDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC3 16544 bytes
SHA-256: 66b7945b99a9c78025a9a0ace4161995b24b08b80ea391fd428eddc3553bac27
font_01_sfnt_off00011586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11586 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D9D 10984 bytes
SHA-256: e1053e6fb51d1a2c6b8dbd8b449c647062c20a494164ff3ea315ce949196c104
font_03_sfnt_off00014766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14766 17844 bytes
SHA-256: 65ad795c45b80500f61c533a0c51e77917e0cbee85a18fb922e884e9cda2407e

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