Malicious PDF — malware analysis report

Static analysis result for SHA-256 0858c9ad69d586d1…

MALICIOUS

PDF

82.6 KB Created: 2021-06-12 09:44:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a6caed27a24c5b25697def159e3f07a5 SHA-1: 270d7f42b8f397769a963507690d7c588473c68f SHA-256: 0858c9ad69d586d12c19b47e01a7cd693df7ff2423fdf1a579b12f0d5ea7b497
164 Risk Score

Malware Insights

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

This PDF document is classified as malicious, exhibiting characteristics of a phishing lure. It contains numerous links pointing to compromised WordPress upload directories, suggesting an attempt to distribute further malicious content. The document's content, though partially garbled, indicates a lure related to 'Ctet question paper 2016 with answers', likely to entice users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nomylo.ru/uplcv?utm_term=ctet+question+paper+2016+with+answers PDF link annotation
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16098756009193---35186388347.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/c821103ff099898d44566444f95cb570/devofo.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/15d0cb80689e0e1f8e4f884b770f6649/liboxokesurosusigeruxo.pdfIn PDF document text
    • http://isagenixmakessense.com/ckfinder/userfiles/files/kafifokamaluvi.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070783aa7db1---memadonon.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072de25e0caf---vanaz.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd4fae5bce---bulerobudefijigot.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a570838ff11---11279232215.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/68125743558.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/riletojejojolekonidibat.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757892bf407---88045575383.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099ea7a22aea---duzudidabozo.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c0dcad340---22377697367.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c353b5b02c7---kuxidenotuletapebewafujeb.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/38240b3bd9773d715785f21e40d55720/taleso.pdfIn PDF document text
    • http://abnicum.com/files/file/parikijizu.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c0277716232---vatinufixoluburakaxadaku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B8 5480 bytes
SHA-256: b6757184a8629ba1ef6f351cc21a019756b132b971dafa355d71e4695ea17232
font_01_sfnt_off00010967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10967 11012 bytes
SHA-256: 00d94b067fb8a4e3aec405c70685421e606aba842421a099714b1150d30d6881
font_02_sfnt_off00012ea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA5 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

Open this report in the interactive analyzer, or submit your own file for analysis.