Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb7075e88fea4943…

MALICIOUS

PDF

69.3 KB Created: 2021-02-15 10:19:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 421a4b6cb58ab06833c5b5b93d93a4a4 SHA-1: 65b8272fd1550853830b20adae16fc94049de4c6 SHA-256: bb7075e88fea4943819d6c4d7e385434577d7d627aaf49385075f49656a340ce
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, contains keywords that could be used as a lure.

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
  • 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://seumenha.ru/wix?keyword=mortal+kombat+x+gameplay+walkthrough PDF link annotation
    • http://metalllift.ru/tinusilevelope7b4we.pdfIn PDF document text
    • https://vesevowix.weebly.com/uploads/1/3/3/9/133987154/6689562.pdfIn PDF document text
    • https://cdn.sqhk.co/pemoxeriko/HEhchiT/36121005781.pdfIn PDF document text
    • http://speak4pro.com/chegg_to7s4b5.pdfIn PDF document text
    • https://vebajixumese.weebly.com/uploads/1/3/4/4/134483039/eab05845ae.pdfIn PDF document text
    • https://mazabutefudoxuw.weebly.com/uploads/1/3/4/0/134017854/8962379.pdfIn PDF document text
    • http://kagotigidiwijar.iblogger.org/63508107495.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bovinow.epizy.com/free_printable_fractions_to_decimals_worksheets.pdfIn PDF document text
    • http://tanasebebibe.epizy.com/digraph_worksheets_th.pdfIn PDF document text
    • http://ratazudawi.epizy.com/risk_matrix_template_doc.pdfIn PDF document text
    • http://sosujogi.epizy.com/darimawob.pdfIn PDF document text
    • http://bixikaw.epizy.com/56925967198.pdfIn PDF document text
    • http://todosix.epizy.com/pijuwirigexowamegeravi.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_off0000d36a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD36A 5528 bytes
SHA-256: da5afbefbb95c762016cf8ec27bf53ca4de07c92f72283d71523f8d46b66dae5
font_01_sfnt_off0000e62e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62E 9984 bytes
SHA-256: 8a7b8eccc40bfa23305e0abfc83545484e7c15adffc141dcc16b565154e1e3f7

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