Malicious PDF — malware analysis report

Static analysis result for SHA-256 06c5ccae1652f5d0…

MALICIOUS

PDF

138.9 KB Created: 2021-04-20 04:53:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: a99d8897674eccd3ccf251f92c41e68f SHA-1: 1649fcdbdbce10085597578eb17e5eb2219196a2 SHA-256: 06c5ccae1652f5d0b8ff7cd4b78850bf1f6696991f8c064d63bb3f07155f0d49
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing attempt. One of the embedded URLs, https://xajibur.ru/strik?utm_term=how+fast+can+rockets+go, is likely part of the malicious infrastructure used to redirect users to further malicious content or download payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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://xajibur.ru/strik?utm_term=how+fast+can+rockets+go PDF link annotation
    • https://tesajezu.weebly.com/uploads/1/3/1/4/131452821/80977accf86c910.pdfIn PDF document text
    • http://creamwalls.online/79583300457bmi6c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379852/normal_6001fef1c1118.pdfIn PDF document text
    • http://wazumitizun.22web.org/79808986921.pdfIn PDF document text
    • https://lozukiwilef.weebly.com/uploads/1/3/4/6/134644014/8341114.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • https://sanupeden.weebly.com/uploads/1/3/5/9/135961416/9610922.pdfIn PDF document text
    • https://bejivuvepezera.weebly.com/uploads/1/3/4/4/134437422/wudikorob-vedikakujedojo-melukugugif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475383/normal_60041e1e9f326.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446165/normal_60648b168ec98.pdfIn PDF document text
    • https://degivuvexopuma.weebly.com/uploads/1/3/4/8/134858753/3043915.pdfIn PDF document text
    • https://tokuniti.weebly.com/uploads/1/3/4/3/134331772/kateluxaloxademuvar.pdfIn PDF document text
    • http://thailandlove.site/stir_the_new_free_tvkqpc7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455881/normal_5ffa7db98ea48.pdfIn PDF document text
    • http://musc-media.xyz/unity_game_template_free_downloadla7s4.pdfIn PDF document text
    • http://nejibaz.22web.org/amplificador_line_6_spider_iv_30_caracteristicas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/34ec9a22-31b0-4666-aae1-ee9891c98538/when_to_buy_and_sell_using_bollinger_bands.pdfIn PDF document text
    • http://tinipolevuzow.epizy.com/3d_benchy_stl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5ad252b-d958-487a-a890-de3da87e9bb8/audio_technica_lp60xbt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edc5a3e5-47ec-47c3-a625-1014a37ddb1a/84941227527.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c9aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C9AA 5136 bytes
SHA-256: 582a92d0d8a5af54517fb402076ddef942c988614bcb66662e7a1c8d55564157
font_01_sfnt_off0001db4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DB4A 13480 bytes
SHA-256: 917ea81bebd563c4ed558158734b141d2ca9c723f7c5c0fa6afa584cddfa14f7
font_02_sfnt_off000208cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x208CD 16064 bytes
SHA-256: 0da5b551d84a453f500a6ba8ca1adfd4400b36dae0f103b74fb712e1a4f46a36