Malicious PDF — malware analysis report

Static analysis result for SHA-256 34be101409f1be14…

MALICIOUS

PDF

80.0 KB Created: 2021-03-15 04:24:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3820e35e58a65fc9e56a062418b65c0 SHA-1: 2f046ef1cac3cb96316748aa4220e96c57394794 SHA-256: 34be101409f1be14caef9e6a02aa74edb0a57f9973460e8f3a5486de6bed6728
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms or malware distribution. The heuristic 'PDF_SEO_LINK_FARM' specifically indicates a large number of external links, suggesting a malicious intent to redirect users. ClamAV detection and ML classification further support the malicious nature of the file. While no scripts were explicitly extracted, the presence of external links and the PDF structure strongly suggest an attempt to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/123?utm_term=excel+function+list+worksheet+names
    • https://cdn.sqhk.co/bitubebo/hh2ieig/kemabotonubuvisare.pdf
    • http://www19216801.site/63234515787hc92k.pdf
    • https://cdn.sqhk.co/lolajelor/gjggiXI/39510142863.pdf
    • https://cdn-cms.f-static.net/uploads/4505837/normal_5fdc6ec66cb55.pdf
    • https://tiwoboromezusud.weebly.com/uploads/1/3/0/8/130874009/kupupovi_podeba_rilikapoje_gitizemobafaw.pdf
    • http://giocodigital.fun/why_does_my_cordless_phone_say_check_tel_linegcbos.pdf
    • https://cdn-cms.f-static.net/uploads/4383137/normal_6028017b88b37.pdf
    • https://mujolimu.weebly.com/uploads/1/3/4/8/134868529/fifidumuvubuwemiv.pdf
    • http://circulshtangcalip.website/1758239842h52ws.pdf
    • https://cdn.sqhk.co/xofozomuwef/rhlgfQ5/dekari.pdf
    • https://bixaguvukimub.weebly.com/uploads/1/3/1/8/131872105/wupugaxorefenud.pdf
    • http://genoray.pro/biology_book_prentice_hall_online_freebx28m.pdf
    • https://cdn-cms.f-static.net/uploads/4489977/normal_601e721b340c5.pdf
    • https://cdn.sqhk.co/xubupigegi/jjcyW2V/external_environment_business_studies_definition.pdf
    • https://cdn.sqhk.co/pimupigedu/ghsZXQj/1010_block_fun_paga.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cbb9655c-b60d-4095-8c1c-bb5f9a2903c5.filesusr.com/ugd/4dd980_2fd4de5e556749a484d15bc0c93f12ab.pdf?index=true
    • https://123949be-7110-4ba3-a240-a7df06fb38ce.filesusr.com/ugd/80fd5d_3875131e84d843289b0aa06fe3aff830.pdf?index=true
    • https://cf4de027-7369-46c2-bf93-d69cabef2b5e.filesusr.com/ugd/868b90_4cb05e8bb6104b6d85040f3105a0f9f6.pdf?index=true
    • https://75a697d3-84f0-44cf-bab9-f05e37020c50.filesusr.com/ugd/7c3584_16752abef1f1474e9ef17acef21a5ee6.pdf?index=true
    • https://a80c0318-1640-4d50-a016-df037fc402b9.filesusr.com/ugd/895bef_3a189278576f46d3b305ee5d4a1f8db3.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e99c.bin
404c5294b7eb3f87dbc240cc48389dc6cc9ecf7a78d2b6a0f2d6e26b798ff89e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE99C 5184 bytes
font_01_sfnt_off0000fb1f.bin
fad433c16c93b0814113cb2b830efac8c4b7cea15e05f1e2002f963621ce11c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1F 11700 bytes
font_02_sfnt_off000122f4.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122F4 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.