Malicious PDF — malware analysis report

Static analysis result for SHA-256 00b7d9d29cd4ab33…

MALICIOUS

PDF

93.0 KB Created: 2021-08-20 15:02:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 38b1796150712fae930b7eb42da97660 SHA-1: a5a2ffe454bdd6fa5aaca1371ff6307a59427d8f SHA-256: 00b7d9d29cd4ab3383fa2f2f4740e7956bdab5d58ca33451acaa9af790b27708
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and numerous links to external PDFs hosted on compromised websites or disposable domains. The heuristic firings indicate it functions as a link farm, likely to distribute malicious content or engage in phishing. The embedded JavaScript is a common method for exploiting PDF vulnerabilities or initiating further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://sasalidayanisma.org/uploads/file/febupozafaliwuboto.pdf In PDF document text
    • http://sushigonewildtogo.com/uploads/files/vexufedor.pdfIn PDF document text
    • http://shesob.com/file/files/sokonu.pdfIn PDF document text
    • http://tandartsindex.nl/images/uploads/wamodifugu.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/03ebf27fe3b08616658c21a48c3e8b3a/73521795367.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ee29a547b---51357456800.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd79e13fb8---71699754220.pdfIn PDF document text
    • http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/wogajojefuniwesunuku.pdfIn PDF document text
    • https://locktactyuma.com/ckfinder/userfiles/files/rebexoni.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607be85035e5f---63719475520.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/2e1bed77b193d8c30e0a4f288d853bf5/11134695909.pdfIn PDF document text
    • http://ombs.ru/uploads/files/67023330373.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d4d002d54---22797419733.pdfIn PDF document text
    • http://magyaringatlanadatbazis.hu/dev/_user/file/11977854075.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/31575291606.pdfIn PDF document text
    • http://rspon.pl/images/wyswig_images/file/10580124297.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/8l61qqiqm2p0j8m97a0tj63koh/najasejeroli.pdfIn PDF document text
    • http://ipublicity.cz/data/file/19810811123.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160751463d419d---xekidatimadibejemer.pdfIn PDF document text
    • http://studiotecnicodama.it/userfiles/files/zawuvotekajikamozekuj.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/abs0ttd65b9l96sj9iiju693pa/tezemuzip.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/58235264429.pdfIn PDF document text
    • http://ambulatorioveterinarioscapindandrea.it/userfiles/files/jezifelisirularaja.pdfIn PDF document text
    • http://albarossa.jp/js/upload/files/72861636062.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+bypass+samsung+reactivation+lockPDF 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_off0001047b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047B 17276 bytes
SHA-256: d981f63abb5a77b20a58490ee9b1dcad6ced80071cd0363635aa5660cd7aa95a
font_01_sfnt_off000130ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14905 11308 bytes
SHA-256: 2bfe6d20904f2870c2b25e8da500fd75f79e3cc80c1ddb7a61b00169194b13b7