Malicious PDF — malware analysis report

Static analysis result for SHA-256 00698ab7de6853af…

MALICIOUS

PDF

70.1 KB Created: 2021-03-01 05:27:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 3c5e4c383f944f2d1c9f297030c57771 SHA-1: b085048e41747df2f992868018080973fbf65280 SHA-256: 00698ab7de6853af9453268bc21b86840ac0eaa39e2cfba78cb706fbb5534d46
186 Risk Score

Malware Insights

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

The sample is a PDF document identified as malicious by ClamAV and an ML classifier. It contains a significant number of external links, many pointing to disposable domains, indicating a link farm designed to distribute malicious content. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it is likely used as a lure to redirect users to phishing or malware-hosting sites.

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://kuzutuzo.ru/aws?utm_term=dungeons+and+dragons+premade+character+sheets PDF link annotation
    • https://xoxudepibedewem.weebly.com/uploads/1/3/5/3/135317482/05b01ebbfe3a2.pdfIn PDF document text
    • https://duzajitoji.weebly.com/uploads/1/3/2/6/132680922/78581d.pdfIn PDF document text
    • https://ruxebawinafa.weebly.com/uploads/1/3/0/7/130776533/jukenibep_vijip_lovorivi_wuzuduji.pdfIn PDF document text
    • https://solakozejifu.weebly.com/uploads/1/3/5/3/135347449/rotipabatan_deluxarewu_wudusatatorirox.pdfIn PDF document text
    • https://kadeborejegan.weebly.com/uploads/1/3/2/7/132740978/tevisijun.pdfIn PDF document text
    • https://reratuzofi.weebly.com/uploads/1/3/5/3/135346135/840f8ace7.pdfIn PDF document text
    • https://miduginoxem.weebly.com/uploads/1/3/4/8/134892771/b6b67.pdfIn PDF document text
    • http://1xbets-regs.site/ditefafagotoguzupusoz9h5nm.pdfIn PDF document text
    • http://onlinesos.tech/hardegree_symbolic_logic76qhw.pdfIn PDF document text
    • http://cybety.xyz/tkb_pendidikan_agama_islamlqfbc.pdfIn PDF document text
    • https://fozogefijegajor.weebly.com/uploads/1/3/1/4/131453134/b76ef7dea2b79.pdfIn PDF document text
    • https://gebonevoduxap.weebly.com/uploads/1/3/1/6/131606392/4223485.pdfIn PDF document text
    • http://wivaserana.mywebcommunity.org/siminurika.pdfIn PDF document text
    • https://kevulukopefot.weebly.com/uploads/1/3/1/4/131453006/4802725.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/ben_10_omniverse_albedo_transformations.pdfIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD339 5452 bytes
SHA-256: 70297aaf3021d6cb69a8b02e9ea76866bd3d0c623c86753b80cfb8f4b010638e
font_01_sfnt_off0000e5a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A4 11036 bytes
SHA-256: 4d3c7dc5fa28aa190798d22ae6e60ba5c4a933fb4a19ad099ffd6ea84786568d

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