Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ca646a86153fd40…

MALICIOUS

PDF

72.4 KB Created: 2021-02-22 11:00:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 0f4d2ae32e31e2c11b53f5bb8a85319d SHA-1: 25b7e927d35ca13867306a0ad072fe5a22e4dbfb SHA-256: 7ca646a86153fd406b61f3e49e231dc83143f77eb9e3a3a9b265a688d7a503e0
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 and are used in a link farm pattern, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=how+to+enroll+in+direct+deposit PDF link annotation
    • https://falatunasozenu.weebly.com/uploads/1/3/4/7/134762474/fojeliderix-kimizagagikimaf-wosogabuxe.pdfIn PDF document text
    • https://kupelaranix.weebly.com/uploads/1/3/4/7/134729830/4673520.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460063/normal_5fe2f6aea2897.pdfIn PDF document text
    • http://ideal-it.fun/arya_2_movie_theme_ringtonet54wg.pdfIn PDF document text
    • http://nnorm-id.com/pmp_certification_guide9ethr.pdfIn PDF document text
    • https://xoburorabusu.weebly.com/uploads/1/3/0/7/130738623/ce778f5a120.pdfIn PDF document text
    • http://ellmax-site.xyz/whitetail_deer_antler_scoring_sheetunvf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417212/normal_60316d005cbbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419820/normal_602a49ef49ef3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408878/normal_6024a3dd0818d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413108/normal_60291903d400e.pdfIn PDF document text
    • https://povebosi.weebly.com/uploads/1/3/5/3/135346093/9915362.pdfIn PDF document text
    • http://slmit.fun/wen_2000w_inverter_generator_reviewjhd4r.pdfIn PDF document text
    • http://teaapple.space/sulufofukomolofanijotd7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459170/normal_600f9d683f02a.pdfIn PDF document text
    • http://dom-bita.org/28730188491e8kui.pdfIn PDF document text
    • http://larts.digital/kezawoxedepupyyqq2.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/diwitapezu/44833263520.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/junajafasava.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/vevupubotenawopojidifeso.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/jabenifu.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_off0000dd62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD62 4908 bytes
SHA-256: 1eca48a748a7f13b1fb8f05de96345108c9036875477115934ca1d0de27e01ef
font_01_sfnt_off0000ee31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE31 10684 bytes
SHA-256: 7a17491e8c7d74bde02bd154c9548428b449bd85f983d83e6a5f67d365f9420a

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