Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8407ae8dfe297b7…

MALICIOUS

PDF

86.0 KB Created: 2021-09-05 14:19:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: be164a00be4d6c3df94a14e0669f68b6 SHA-1: 71f8ad5793dd4d71e45a3a35e9bb9d616f4ad1af SHA-256: e8407ae8dfe297b7b894fcd6c660c94706340aec708cc1b9900e12077e48a036
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous URLs, many pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern. Although no scripts were explicitly extracted, the nature of the URLs and the overall detection suggest it is likely a downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7a758dfcd---29249243268.pdf In PDF document text
    • http://tiwtactic.com/userfiles/files/jetapuvo.pdfIn PDF document text
    • http://podlahyadvere.sk/editor_uploads/system/files/tasel.pdfIn PDF document text
    • http://seatraderhk.com/userfiles/65731303146.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607209e8ee97f---lexalozirawa.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd83197cc33---61531251733.pdfIn PDF document text
    • http://alphamarino.kz/images/news/file/namubamijozigibovuz.pdfIn PDF document text
    • http://rld-carbon.ru/file/15817124786.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b4d1b18d7ee---39865762476.pdfIn PDF document text
    • http://web68s.com/upload/files/52579965056.pdfIn PDF document text
    • http://www.moyekolodin.com/files/figipipazimofugovosutu.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/90e21d39396bc4c1e2210b83f25912cc/kiguzoxetawo.pdfIn PDF document text
    • https://stgeorgedentalcare.in/ckfinder/userfiles/files/8828898668.pdfIn PDF document text
    • http://synerfreight.com/syner_upload/images/files/66845858483.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160997321e8542---xebajigotekipuj.pdfIn PDF document text
    • http://vecsecity.info/editor_up/gewilenebitevedepi.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160878174022b9---wabavonanoz.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b46985d60cc---fawetizepukapakawir.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/e738d1e90dfce17fc3fed3555352c345/68901712481.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/2bd5ab20b9217b278158d22e0c66c1cb/29289299409.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d3dd2ca5d7ff769c30b9c19e709bb25d/7008848781.pdfIn PDF document text
    • http://resurrection-life.net/userfiles/files/mesedudoxupetenanu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=physical+effects+of+smoking+pdfPDF 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_off0000eaef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10301 17496 bytes
SHA-256: daca0d58882b2fcfa963e73aef17877a37718151fe4922f76cbc6234bddf62d3
font_02_sfnt_off0001309f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1309F 11176 bytes
SHA-256: 68b2026a871e4bfc6522fc9754cc93ba6eea7bdd1f7aee21d23a217b88e81922

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