Malicious PDF — malware analysis report

Static analysis result for SHA-256 24e38c28fb28fb92…

MALICIOUS

PDF

81.5 KB Created: 2021-06-26 08:47:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 11753eb9985643b08ff63d0561b8e44c SHA-1: 9d0a0589371938bd4273bc8679153e56ca1211ca SHA-256: 24e38c28fb28fb92095c09a97b23389ff0a517a39ffc35bf9352aa82f7a03e6f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple compromised WordPress sites and disposable hosting links reinforces the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/59nkpq0jc6aacq9ao7hm7m0507/geponebikaguli.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d773b25ac---tefakanevuzaginitimuj.pdf
    • https://ms01bet.net/contents//files/towen.pdf
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/16090a49350c22---sezosewux.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f17533135f---97561080143.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd574494ff---pakijuvuxotuni.pdf
    • https://accuratesearch.com/userfiles/file/27889810622.pdf
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/b2c8b4340e1aeb6447f5db5eef257bd6/tesivanenurowaku.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a48f550c1b1---99278934429.pdf
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/ee21c7a9ad4dfaa22914142b83c8630d/fakokirugojexapimoj.pdf
    • https://eyetracking.pl/userfiles/file/jarinexisazinesu.pdf
    • https://acgroupenterprise.com/userfiles/file/2791074547.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b32ec54b2d9---38624724870.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160767eaf842e7---gewovofexitosig.pdf
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/18597910486.pdf
    • http://strategie-online.net/catalogue_dynamique/file/55807927403.pdf
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3f3dfe00fb18881f5936bdc120bac528/metakenaladixekeriwosis.pdf
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfda421a4e4---wijexurajifotedel.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16071fbb5da5d8---42380628496.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607be9164be5f---litowubopapedidejakano.pdf
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/ug6pm5p79dh8tnosv4sqba1p12/87720416396.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/euuv4cdf08619m8q2s6qfum4ci/9829085558.pdf
    • https://advance-pack.com/editor_upload/file/wagobavirugavewa.pdf
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/91ae0548af4586ebe3e3da8860a6cacf/82001250258.pdf
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/d30771a0d584776fc2dab114f93531b2/91981386659.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=windward+town+%26+country+plaza
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd25.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD25 16792 bytes
font_01_sfnt_off0000f537.bin
0d71991aa62f07a1276ce9df59ff3d817a3182c9d7ad610e084ea769850fad7b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF537 16820 bytes
font_02_sfnt_off0001213a.bin
5f2628e516b2bab3db92ffd00c4fc0c6a0aee8c7136b8ace04b299f6270d65ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x1213A 9972 bytes