Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d1056123f30eae1…

MALICIOUS

PDF

79.2 KB Created: 2021-09-14 02:05:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 93bdabdd40e1d29f3f68d5e41c73c53b SHA-1: 9b83279e95899b38781973a85d3b172ac0655270 SHA-256: 1d1056123f30eae15dcc3095da9dd8ca659c2beed68656650b910dfea6b687b0
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to suspicious domains and are part of a link farm, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and the presence of external links are indicative of an attempt to redirect users to malicious sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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 http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161377a6514bbc---libesilofivazale.pdf In PDF document text
    • http://impactpluslearning.com/ckfinder/userfiles/files/kopevajulisapi.pdfIn PDF document text
    • http://xn--h1aeekk.xn--p1ai/files/file/jetawunazipixobofewukonor.pdfIn PDF document text
    • http://hoya-system.com/uploads/files/202109131919403919.pdfIn PDF document text
    • http://area100impianti.it/userfiles/files/nogexi.pdfIn PDF document text
    • http://markone-tools.com/upload/files/66407749238.pdfIn PDF document text
    • http://spellenindex.nl/images/uploads/22984017158.pdfIn PDF document text
    • https://www.traitagri-solutions-alternatives.fr/ckfinder/userfiles/files/vadigapakapulajalebojaki.pdfIn PDF document text
    • http://gesundezellen.de/neu/userfiles/file/palofowiboluzesi.pdfIn PDF document text
    • http://trustycctv.com/ckfinder/userfiles/files/99147896853.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/77272547288.pdfIn PDF document text
    • https://openkomm.yussfone-crm.com/userfiles/file/wagaba.pdfIn PDF document text
    • http://china-hold.com/UploadFile/file/20210901115008032.pdfIn PDF document text
    • http://kozhencherrymtc.org/userfiles/file/42357186818.pdfIn PDF document text
    • http://airzo.net/userData/board/file/nurarikafobisutagugiroja.pdfIn PDF document text
    • http://n2nlah.org/UserFiles/file/fexulugil.pdfIn PDF document text
    • http://asu78.ru/userfiles/file/bikizater.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a1885129f8---45919371777.pdfIn PDF document text
    • https://eurotig.ro/file/zevow.pdfIn PDF document text
    • http://nirmalamathachurch.org/cms_uploads/image/file/80614724241.pdfIn PDF document text
    • http://livestocktool.com/d/files/18159368856.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=thoptv+38.0+downloadPDF 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_off0000d1a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A3 10680 bytes
SHA-256: 44629b38707d458052388aaaca62762e4d605e92d20bcb0b7d4dbddb50f8f6fb
font_01_sfnt_off0000ea24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA24 17656 bytes
SHA-256: 61067329d5ffad7fc390962856c0bcb4cc1fc114f0c0eb68e382faa28627ebfb
font_02_sfnt_off00011721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11721 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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