Malicious PDF — malware analysis report

Static analysis result for SHA-256 133da260c965d33c…

MALICIOUS

PDF

85.8 KB Created: 2021-06-09 18:47:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 27cffebdaf832570d7a0bbaa2741b097 SHA-1: 288b01a4a94514c949aa95acc79534c1ccaf53bd SHA-256: 133da260c965d33c93cfc08bddb25d44e327bd42b1c586db38b5ec241d5233f3
156 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to various websites, many of which are hosted on compromised WordPress installations. The embedded URLs, such as 'https://philabc.ru/uplcv?utm_term=punjabi+movie+chal+mera+putt+download', are designed to lure users with promises of movie downloads, likely leading to further malicious content or phishing attempts. No scripts were extracted, but the PDF structure and URL patterns strongly suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • 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://philabc.ru/uplcv?utm_term=punjabi+movie+chal+mera+putt+download PDF link annotation
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aff2bb7f8f---60811160204.pdfIn PDF document text
    • http://elcampoeco.org/FCKeditor/file/gerapi.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/ab6a498a7a61ba9380133330e5d8044d/betufasilatarotaburuguse.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608820a49177d---vaxawaw.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/14614960010.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2d1478ae8---168790311.pdfIn PDF document text
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/kenojonedorine.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/fj8kvhbqi71iarn8kkss3cqd3s/nigawudavova.pdfIn PDF document text
    • https://nestaerospace.com/uploads/file/58008320008.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/59880557738.pdfIn PDF document text
    • http://worthingtonpark101.com/userimages/mutazuninepedidoxamabe.pdfIn PDF document text
    • http://ruresept.ru/files/file/bukidumarupoguzoboxaduvux.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac9da45860---pixususisavenu.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b5e958385---wevupopupatojedazuwasax.pdfIn PDF document text
    • https://hagepoorter.be/files/files/wufedoxafenaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD488 5504 bytes
SHA-256: 536242bc2aeb71d0ea4512d7660890329bdfd04439d3a85bfe62cfe0c55e4be6
font_01_sfnt_off0000e71e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71E 9088 bytes
SHA-256: 662ea44b1fc0c3871934d7beb88b11b9533ad01232800cf53b82b3c06075d86a
font_02_sfnt_off00010041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10041 11268 bytes
SHA-256: 8c3e0bc8bfa36ef7dd8a8f5ca1a51d14347d24a3f682c4fcbf0ff737e11aaa91
font_03_sfnt_off000126e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126E2 18120 bytes
SHA-256: 4b14acd196857cdf23035b09bb1865cb6148324d262233db996d022f14930b1e
font_04_sfnt_off000141c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141C6 1736 bytes
SHA-256: 0d9b6ab0354368cdfa5a4e52e4dfb250ede80cec4283e48fafec0a3c1c1d30df

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