Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2e336d2379ea95e…

MALICIOUS

PDF

74.7 KB Created: 2021-03-22 02:46:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: c510db8be01738439ed423eb204a61d5 SHA-1: dc823d5129aa60d4bbc7a65e69fd1565f7568422 SHA-256: b2e336d2379ea95ef36618c5c4125d0284c3ac6aa8859afb7b2c8c54e56652f9
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, characteristic of a link farm used for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/wix?keyword=ocho+caracteristicas+de+una+iglesia+saludable PDF link annotation
    • https://cdn.sqhk.co/riteximeras/jh6USjh/smithsonian_channel_directv_schedule.pdfIn PDF document text
    • http://lupelisizi.medianewsonline.com/fagupipegapevogalamo.pdfIn PDF document text
    • https://cdn.sqhk.co/fosulavale/ijjxijP/mejumilazukamupasepu.pdfIn PDF document text
    • http://gagezejiwakale.iblogger.org/love_anniversary_images_free.pdfIn PDF document text
    • http://saramofupoke.iblogger.org/kisuxijikowaverize.pdfIn PDF document text
    • https://cdn.sqhk.co/segidexu/hji9jct/fema_is_700_questions_and_answers.pdfIn PDF document text
    • http://dexaputanit.mygamesonline.org/42006125414.pdfIn PDF document text
    • http://vorakumezaxof.mygamesonline.org/78486290827.pdfIn PDF document text
    • https://cdn.sqhk.co/banamasuvaj/ieIAJ8K/universal_paperclips_game_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/mivuxakadu/5gd6jbh/39314784588.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ca3ec1ac-6ff7-4c8f-ae0f-86a30d86e335.filesusr.com/ugd/3615fb_54c63ea21b454296a657d6f51f5344e4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a424e2d0-54df-49cb-9576-f9da6148548c/g_shock_ga_100_original_vs_falcon_ga-100-1a1er_20_bar.pdfIn PDF document text
    • https://48b7024d-7414-4593-b44d-ed892b96ad15.filesusr.com/ugd/3e5db3_4496faf3fdf64b4daf2a88bea7152bab.pdf?index=trueIn PDF document text
    • http://naburonip.myartsonline.com/ontario_vehicle_safety_inspection_checklist.pdfIn PDF document text
    • http://josetevuj.epizy.com/dovufavukizeruruson.pdfIn PDF document text
    • http://muwojes.epizy.com/9111633299.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3baf5798-5a70-4bbd-bbd4-8ddd0cdb6214/50759449733.pdfIn PDF document text
    • http://jipudovisubu.rf.gd/audio_songs_telugu_hd.pdfIn PDF document text
    • http://tevokini.rf.gd/koxajaro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be3809f3-987e-409a-8c69-2b457dd8abd6/47354346294.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_off0000e2da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DA 5368 bytes
SHA-256: 64e6fc02a13d4c2ff5f2669321c082961269f4bbcda9765276be5d7bbc992c2e
font_01_sfnt_off0000f50c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50C 11964 bytes
SHA-256: 9ebcfe3a77f2c397e634d482154005dcb2f4d311a482b833a0d329cf118c544b

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