Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2c078b7be37c6b0…

MALICIOUS

PDF

83.4 KB Created: 2021-04-26 04:21:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9f330cd3b08a59450ece184b28aa4c2e SHA-1: 0a6245d3bf96cc1d91f2209771adf9a7d0eb884d SHA-256: f2c078b7be37c6b01a1b50117feab7417e2c9b838ab02bcc2bb476be7baf8d97
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to distribute malicious content or redirect users to phishing sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via these external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://kuzutuzo.ru/strik?utm_term=marine+corps+hand+signals PDF link annotation
    • https://tunibedexorole.weebly.com/uploads/1/3/5/3/135350281/rekusasoguj_jezipek_fatijo_nemovomosebava.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414515/normal_6046814a670b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458833/normal_601a5be09d293.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383912/normal_6012a518732c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421983/normal_5fce670dd5f6e.pdfIn PDF document text
    • https://jesodiretax.weebly.com/uploads/1/3/4/6/134659119/dexefukopi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423429/normal_5fda5815ae5d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464878/normal_5ff21f463cbb0.pdfIn PDF document text
    • https://kewekekonuv.weebly.com/uploads/1/3/4/7/134732265/lawikew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382192/normal_601e4f965c38e.pdfIn PDF document text
    • http://joriwolujuf.sportsontheweb.net/gajuledinowesikefosu.pdfIn PDF document text
    • https://fezagexagowib.weebly.com/uploads/1/3/5/3/135313062/3543769.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489975/normal_5fcbc6b04b9d8.pdfIn PDF document text
    • https://dutaveporope.weebly.com/uploads/1/3/4/6/134600224/1999952.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371800/normal_5fcb5bd371c7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450250/normal_601466c722c95.pdfIn PDF document text
    • https://cdn.sqhk.co/wudarivat/je3UiWp/fall_hair_color_captions_for_instagram.pdfIn PDF document text
    • http://larokamexi.sportsontheweb.net/bofopelojazagugizuluxeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409628/normal_6016101f3ab64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409628/normal_5fd8924ad1541.pdfIn PDF document text
    • https://cdn.sqhk.co/jirudumom/yrjiajd/83520110657.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386839/normal_6051b31718214.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/iigjdFl/century_21_dept_store_paramus_nj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fojakosi.atwebpages.com/thematic_apperception_test_ssb.pdfIn PDF document text
    • http://liduvitulugug.onlinewebshop.net/nutritional_biochemistry_free_download.pdfIn PDF document text
    • http://biwefejiza.myartsonline.com/bartonella_spp.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_off000109c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C5 5340 bytes
SHA-256: ab70a9ebef24847deadba0b9ebfc7d7db6de47093a51ea395aa4085893572364
font_01_sfnt_off00011bf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF1 10528 bytes
SHA-256: 217c6963369f1408801474e923499e8695f08e6ca0f86c106307fd8b53d896b7