Malicious PDF — malware analysis report

Static analysis result for SHA-256 90e496278d73c147…

MALICIOUS

PDF

73.4 KB Created: 2021-02-28 09:59:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9006d3b5f1aa64934f8b0d485751b1cb SHA-1: b72e262feb3cfbc810f618f2956e9576449a55c8 SHA-256: 90e496278d73c1470ba0a4fcb94699a15fe014411375339535db8e3e8f77bcc7
66 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs and heuristics indicate it functions as a link farm, directing users to potentially malicious sites. The ML classifier strongly flagged this PDF as malicious, suggesting it's designed to redirect users to harmful content or initiate further compromise. The document body, though partially corrupted, contains text related to search queries, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://xezojetit.ru/wix?keyword=conflict+in+hamlet+play PDF link annotation
    • http://swast-group.website/contra_revenue_account_lists7vt6.pdfIn PDF document text
    • http://alkim.xyz/how_to_learn_english_online_free1htho.pdfIn PDF document text
    • http://ragixanomus.iblogger.org/73886851904.pdfIn PDF document text
    • https://bugajikiwolano.weebly.com/uploads/1/3/4/4/134471946/bagipobiv.pdfIn PDF document text
    • http://kipigonatusa.iblogger.org/woxodarobiratuwi.pdfIn PDF document text
    • http://lerob.info/253326691209dvt9.pdfIn PDF document text
    • http://winoorama.website/kafixe564di.pdfIn PDF document text
    • https://farazekij.weebly.com/uploads/1/3/4/3/134379469/6591574.pdfIn PDF document text
    • http://com-copyrighit.com/55100680883lrmhi.pdfIn PDF document text
    • http://ramuwazezu.22web.org/photo_nature_hd_wallpaper.pdfIn PDF document text
    • http://melakodesalef.22web.org/bible_new_testament_books_chapter_summaries.pdfIn PDF document text
    • https://nerutaraludu.weebly.com/uploads/1/3/4/6/134672403/1284659.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://varoxekoduv.epizy.com/57372822272.pdfIn PDF document text
    • http://lojuwuwa.rf.gd/cisco_air-lap1142n-n-k9_configuration_guide.pdfIn PDF document text
    • http://tuzoxizusuzu.epizy.com/sezexejavelipelofenam.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_off0000e62b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62B 4988 bytes
SHA-256: f92820ed38f00d90cca19cfb390f37b06fd3c3c09344363f690cf9c9f5f929bf
font_01_sfnt_off0000f70c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70C 9876 bytes
SHA-256: 71c450e5ac3b76f945203ff68a5b3a6d73f89c4191f26fc637931cb058cb991b

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