Malicious PDF — malware analysis report

Static analysis result for SHA-256 b915eaa1b838d8fe…

MALICIOUS

PDF

111.6 KB Created: 2021-06-13 14:24:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d23403e70b95d27f734748d966ad7d76 SHA-1: b149778774cb42e784994eb8736ac5999715dce4 SHA-256: b915eaa1b838d8fe46fc3abb21b9e06d4e7bf5fa34f36cc907afe7fa85c496d8
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains a reference to 'Dragon ball z theme lyrics', likely a lure to attract victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=dragon+ball+z+theme+lyrics PDF link annotation
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1609eb047e266d---18406510079.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1a984a986---duwubewasij.pdfIn PDF document text
    • http://creptiles.dk/userfiles/file/bubifowosar.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/57630640259.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/56b8816698e1f02412b2f6ec7eeff4b4/doselexizekikenuxi.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/4f516c23c1ce11d92e2a2beca73cbb13/vewek.pdfIn PDF document text
    • http://kotolantopeni.cz/file/fumupulak.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/nujatikam.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/f64897149e4e630c98fb37ba4654e871/xuduj.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/nizekapepaloditikesazem.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16091c57a8627f---gavok.pdfIn PDF document text
    • https://inncredel.com/uploads/wavaxetiwopadokukezokej.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/63705899764.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160706be210119---58098705156.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/4371c59c6a5ac2b90168928a7d2f78a2/desiveporupalo.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748fd31009e---94919242546.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a85548b0d41---wovanifelaj.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa49bafe23---7089573014.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f56d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56D 41776 bytes
SHA-256: c47a0b0065e849d479fae632c7ca08b00914a7d95e52c05d6a96ffd9be2a2c4a
font_01_sfnt_off00017826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17826 5504 bytes
SHA-256: f87b84dfaf672282bcc29eb21bab120033a5f6f3a93f99f7f6a8d520e831d6ac
font_02_sfnt_off00018ac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18AC8 12088 bytes
SHA-256: 48ac5469b3ee06f035b690e9334cb574483416868b3a1bf2a979278843ca7cc9