Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0e1a5756d6b3a90…

MALICIOUS

PDF

87.4 KB Created: 2020-12-20 06:57:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: cbe1b59b18b5f4e2d5696d13ead88add SHA-1: 24413d577e3bf51f216e3a6c3af1872b2b92c39a SHA-256: e0e1a5756d6b3a9011abe5f7df6c6336eb1db3f622faeb2cd8f1f0d82718a1b5
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffe.ru/strik?utm_term=bee+movie+ken+meme PDF link annotation
    • https://sasogobol.weebly.com/uploads/1/3/4/3/134387633/791041.pdfIn PDF document text
    • https://nonesuwenuvav.weebly.com/uploads/1/3/4/4/134400251/4962289.pdfIn PDF document text
    • https://fabobabi.weebly.com/uploads/1/3/4/6/134678451/wuloj.pdfIn PDF document text
    • https://lunotoxo.weebly.com/uploads/1/3/4/7/134760069/9230368.pdfIn PDF document text
    • https://vixikubinimagap.weebly.com/uploads/1/3/3/9/133997110/majoratan.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/jifekaw.pdfIn PDF document text
    • https://megeleju.weebly.com/uploads/1/3/4/3/134319984/411b611bb84.pdfIn PDF document text
    • https://zupudawuliwubil.weebly.com/uploads/1/3/4/2/134265939/ea345df.pdfIn PDF document text
    • https://femekeviwafuga.weebly.com/uploads/1/3/4/3/134345727/5d43ba39c92.pdfIn PDF document text
    • https://musufofijadora.weebly.com/uploads/1/3/4/8/134888277/2374529.pdfIn PDF document text
    • https://dolujutizividev.weebly.com/uploads/1/3/4/8/134864897/wupodoziretevuka.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc2814bab79f442f233bc55/t/5fcc0b1374a40730fb863e12/1607207700025/wexowavidagigepuwuvax.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/apk_anonytun_pro_versi_terbaru.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_off000117bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117BB 4488 bytes
SHA-256: 6986139b36641e9859ea0fa9dfd4abe9f141f61e2c5e57b4ec96d8084905dab9
font_01_sfnt_off000126fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126FC 12768 bytes
SHA-256: abded452772e010540da68bbf1f7c20a03a1d428d75a67c8ad90e316e5f748f3

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