Malicious PDF — malware analysis report

Static analysis result for SHA-256 e18142f473fc252c…

MALICIOUS

PDF

76.0 KB Created: 2021-03-22 21:27:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 66419a5cc59621583d2422ee5124b6e9 SHA-1: dcdd9f4a47cfb6e163da0f6a3e59147ba9727280 SHA-256: e18142f473fc252c190c591c1385b3eacb59a463f8086d9be0ff21f74f5c5a11
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, with a high ML score and ClamAV detection indicating malicious intent. It contains numerous external links, including one to 'zajinet.ru', suggesting it's used to direct users to potentially harmful websites. The presence of embedded URLs and the overall structure point towards a phishing or content-luring attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://zajinet.ru/123?utm_term=argumenta%25C3%25A7%25C3%25A3o+l%25C3%25B3gica+pdf PDF link annotation
    • https://vexifodukegaze.weebly.com/uploads/1/3/5/9/135977609/9e5fb1cb66c2389.pdfIn PDF document text
    • https://wexejejide.weebly.com/uploads/1/3/3/9/133986252/donegaf.pdfIn PDF document text
    • https://watibovogop.weebly.com/uploads/1/3/4/8/134876481/posob_bofajoduba_komulejazevo_guluxogigo.pdfIn PDF document text
    • https://vilofezilo.weebly.com/uploads/1/3/0/7/130740065/duwul_padofojelowow_zilavasirop.pdfIn PDF document text
    • https://fowaloxew.weebly.com/uploads/1/3/4/8/134881160/dc9ac.pdfIn PDF document text
    • https://jakinazar.weebly.com/uploads/1/3/1/0/131070367/guzubigirol_xojoli.pdfIn PDF document text
    • http://bazunujovi.scienceontheweb.net/rirovevavavumijedodif.pdfIn PDF document text
    • https://kijomexed.weebly.com/uploads/1/3/1/0/131069838/jidewexiv.pdfIn PDF document text
    • https://fezugewibopav.weebly.com/uploads/1/3/5/3/135346468/7ba25e28.pdfIn PDF document text
    • https://mudomuroda.weebly.com/uploads/1/3/4/7/134728654/1296208.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ee6bc897-aa08-459d-b6e6-b1b1d69fcba1.filesusr.com/ugd/7ba596_af57d2adeeab42c3a86e49ad1fd8f32f.pdf?index=trueIn PDF document text
    • https://87c8fc71-818b-4167-bf0d-2ac3bc49ffd1.filesusr.com/ugd/f9d4cd_ed0d3838327041e8975377821df26323.pdf?index=trueIn PDF document text
    • https://b6c9d0de-81a1-4db9-ab7d-8a95af9e63d6.filesusr.com/ugd/b28ae2_c830d56a95b541babed19b81d1108fed.pdf?index=trueIn PDF document text
    • https://f8071fb1-33dc-4bb9-9fe9-292e0ca0d861.filesusr.com/ugd/253000_001f3b96464e488b9fced0fec67baa15.pdf?index=trueIn PDF document text
    • https://49550882-97ce-44db-a38b-6e383bb81149.filesusr.com/ugd/062c90_e49889ca9e334175b118a376a1022250.pdf?index=trueIn PDF document text
    • https://86146b48-cf95-488a-b5a0-22832f4589a6.filesusr.com/ugd/3b4eee_b20046ca7bc94361aed072e2dc146de7.pdf?index=trueIn PDF document text
    • https://041aa876-b65b-432c-96c0-58c8b295a4e4.filesusr.com/ugd/90d19e_5a531f8bab3a48ebad26eddf35b0ff2b.pdf?index=trueIn PDF document text
    • https://f200304d-316b-45a9-b05c-680123ec6d1a.filesusr.com/ugd/aad1a2_d560064167704ae9914a1267972d27b2.pdf?index=trueIn PDF document text
    • https://0ac950e2-707a-4e47-8bf4-daface0ea9db.filesusr.com/ugd/356f11_ffca044ca58946cf943cb38c1f442673.pdf?index=trueIn PDF document text
    • http://gajamozaxekega.atwebpages.com/3893615160.pdfIn PDF document text
    • https://883cd1dc-02d0-4059-8fa2-99201f92b631.filesusr.com/ugd/6166c9_429c90f53c0d445b9f4e2d0e03954747.pdf?index=trueIn PDF document text
    • http://vigexosav.myartsonline.com/lozodegatazego.pdfIn PDF document text
    • https://80820154-e864-4b0c-832b-212b24169927.filesusr.com/ugd/c12414_890ed2db80da42f18cda04782e7c2a5f.pdf?index=trueIn PDF document text
    • https://065b66ee-25d8-4381-b309-094abc4d823c.filesusr.com/ugd/2703e6_0c6adecf28dd43d88e22b715c8744b35.pdf?index=trueIn PDF document text
    • http://maretubozewugi.myartsonline.com/the_bastard_of_istanbul_ebook.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_off0000e654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE654 5924 bytes
SHA-256: 224d864dcbc5f231291d46c0dbad47d816b557bac566b7a0d12a19cf35eb2d4f
font_01_sfnt_off0000f957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF957 13080 bytes
SHA-256: c6310a5333f9c2a0bca5a71d9af1065b3f48b864b1a3da48c1f5e2cd91e93b2b

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