Malicious PDF — malware analysis report

Static analysis result for SHA-256 a86d1c7dabbbbfdc…

MALICIOUS

PDF

71.7 KB Created: 2020-12-27 04:02:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: aa457d9586d3f3ae3ea0972e7f21ea6c SHA-1: d14e05cbe2b3d0724553703ec20dd41bcc111f36 SHA-256: a86d1c7dabbbbfdca4d592191fdeba49c7b9319c578d101f000749ef42f4af58
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'wormate io zoom hack download', suggesting a lure for potentially malicious downloads. The presence of a link farm and the ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?utm_term=wormate+io+zoom+hack+download In PDF document text
    • https://vewusijonaw.weebly.com/uploads/1/3/4/4/134489037/7ce0f5c0bc3c71.pdfIn PDF document text
    • https://rabugotekinevod.weebly.com/uploads/1/3/1/8/131871666/ragenuvu.pdfIn PDF document text
    • https://jokenobijejadur.weebly.com/uploads/1/3/0/8/130873794/nuzasir_pareza.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/jiwisigetizoxif/refexako.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/business_case_studies_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/legore.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/business_english_topics.pdfIn PDF document text
    • https://s3.amazonaws.com/wujanozo/83579952979.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/24519879984.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/74641024003.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/mitowinawemu.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/zilelamebadexenewipawikob.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_off0000de0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0E 5220 bytes
SHA-256: e5fe8d671cdd53dd01415e5aeac40d7096a4bf08b69aed2a48cf303487c7b937
font_01_sfnt_off0000efbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBD 10108 bytes
SHA-256: 7d6232bf15004adbd70a6946b84c92f8c0c6f9149ec33b1d53f7a3e06d5fc200

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