Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ba9d8909147fbc7…

MALICIOUS

PDF

73.5 KB Created: 2021-02-15 20:11:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 4422620b7f4523b8b08d07081f37a0df SHA-1: 2ba24ed3e113d4b967b1b4cb4f6f1b1155ae1c42 SHA-256: 0ba9d8909147fbc7b0a94ee39628f612560feff85d7d4a6c528bde3cd36ddcb2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with one prominent URL pointing to 'seumenha.ru', suggesting a phishing or malware distribution lure. The presence of multiple links and the 'link farm' heuristic indicate an attempt to direct users to external, potentially harmful, sites.

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 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=sarah+grey+lucifer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421474/normal_5fd92d4d6a648.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499283/normal_5fd2f2782869c.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/hfugdig/fexajokul.pdfIn PDF document text
    • http://menetufebev.22web.org/billie_jean_ringtone_for_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444100/normal_5fe90b3075c0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462056/normal_5fd1157e46d31.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxarulenogu/ahfighb/halloween_costumes_for_kids_girls_amazon.pdfIn PDF document text
    • http://mon-cmso.best/59637839056jqwcm.pdfIn PDF document text
    • http://vewisezozebo.22web.org/widojonixij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528780/normal_601afa41c62e9.pdfIn PDF document text
    • http://reduslim-official.website/community_service_log_sheet_word_documentxmqvc.pdfIn PDF document text
    • http://damizav.iblogger.org/luzonigakunu.pdfIn PDF document text
    • https://cdn.sqhk.co/vimexuda/S9gigN2/xerukobawolaxulapojoto.pdfIn PDF document text
    • http://shoop-fn.ru/soft_sheets_as_seen_on_tvqm92a.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
    • http://wawutanow.epizy.com/1578114236.pdfIn PDF document text
    • http://kavotipuwevir.epizy.com/handwriting_practice_sheets_kindergarten.pdfIn PDF document text
    • http://buwozefavimim.epizy.com/zabuge.pdfIn PDF document text
    • http://ferogexomemu.rf.gd/nejikidumotamusexelosijop.pdfIn PDF document text
    • http://lekekavom.epizy.com/basic_english_vocabulary_worksheets.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_off0000d68a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD68A 4756 bytes
SHA-256: cbca01cfaaec2a2267c5ddac0ecf757da9ff010691777e2f61c495edc887f55f
font_01_sfnt_off0000e6c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C8 10536 bytes
SHA-256: 42bcfade4ae1a996c4e1d8bd1f5ffb1aeae7f08cebef42d26f1fcefb30d0e08d
font_02_sfnt_off00010ae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE4 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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