Malicious PDF — malware analysis report

Static analysis result for SHA-256 d68321aafd871aba…

MALICIOUS

PDF

79.6 KB Created: 2021-02-28 08:27:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 01c83f42de28bafd07806156ff9fc5df SHA-1: 4619563d384926756783608ec6a0ce283b4dff30 SHA-256: d68321aafd871abad0503e6a3cb4419d7456ec07fcb0700819c37f210893890c
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains including 'ellmax-site.xyz' and 'druttle.ru'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the structure suggests an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://druttle.ru/wb?keyword=baby%20einstein%20neighborhood%20symphony%20activity%20jumper%20walmart PDF link annotation
    • http://ellmax-site.xyz/990610105792mwyh.pdfIn PDF document text
    • http://businessoutsourcing.info/how_to_learn_to_use_tarot_cardsrjl6i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426687/normal_5fe661373e30c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468537/normal_600721e240823.pdfIn PDF document text
    • https://puzejiwitamino.weebly.com/uploads/1/3/1/4/131453698/89472c7ca5.pdfIn PDF document text
    • http://walletelectrum.buzz/11909978257qwzb6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447097/normal_60043fa298c2a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wunojipu/learn_arabic_language_in_bangla.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/kadodudadexewexafe.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/answering_machine_messages_for_doctors_office.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/20585133594.pdfIn PDF document text
    • http://nakeviw.myartsonline.com/the_lost_ways_book_1_and_2.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/21405532917.pdfIn PDF document text
    • http://zitulogakapede.myartsonline.com/benolubiruvefovuninakeg.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/qualities_of_good_writing.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ead4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD4 5888 bytes
SHA-256: 7466227fa6cee483697c2ac00bdd25277a6401d411f70c75a1f11f14dbfb45c4
font_01_sfnt_off0000febf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBF 10488 bytes
SHA-256: bb083896568a3f6423203231bed3802dd1bf7f6f313788778f6b377eca2d0b3c
font_02_sfnt_off000122b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B7 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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