Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec9dc275338d6ffa…

MALICIOUS

PDF

100.5 KB Created: 2021-03-24 13:30:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: b5d2e5d3079c8848bb46dc675d0d190b SHA-1: 55751113a3c84bfcb32e069382c62529191155b5 SHA-256: ec9dc275338d6ffa26f09842bd9f0dc92c11188ffbecd7af93ceb2273cf9f0aa
186 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, with numerous embedded external URIs pointing to various domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://midufefew.ru/wix?keyword=ffxiv+crafting+rotation+40+durability PDF link annotation
    • https://belexikezetuvom.weebly.com/uploads/1/3/0/7/130775063/bozexader.pdfIn PDF document text
    • https://cdn.sqhk.co/mofokamibe/bqjdhjd/word_blitz_tips.pdfIn PDF document text
    • https://dagazafija.weebly.com/uploads/1/3/1/4/131484603/juwalisomev-jarosezapofal-zokokavekogur-kilepep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388038/normal_5fe4312d12a4d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490529/normal_5fcd6066a8154.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367938/normal_5fffe09288796.pdfIn PDF document text
    • https://cdn.sqhk.co/mibaforetu/9hdgcuZ/xekorapebugade.pdfIn PDF document text
    • https://cdn.sqhk.co/duzoxibuf/imFiihj/sokopizuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473379/normal_5fd64c11e620a.pdfIn PDF document text
    • http://crawlmqyu.space/jatadofidixeamkg7.pdfIn PDF document text
    • https://cdn.sqhk.co/musezikuzapi/hjb3hay/coffin_nails_long_ideas.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizufofuj/ijbvPjj/niwogoluzosovuwu.pdfIn PDF document text
    • https://cdn.sqhk.co/finulepaf/fhihbcL/pirolik.pdfIn PDF document text
    • https://cdn.sqhk.co/tamejenonisi/56jdDjb/minecraft_epic_wooden_house_tutorial.pdfIn PDF document text
    • http://trysalon.xyz/where_is_the_drain_pump_filter_on_a_whirlpool_front_load_washerl45tm.pdfIn PDF document text
    • https://nowiwadigomu.weebly.com/uploads/1/3/4/0/134018048/6262623.pdfIn PDF document text
    • https://bivajegozu.weebly.com/uploads/1/3/4/5/134598736/309db0.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/hgjfEja/pdf_annotator_free_portable.pdfIn PDF document text
    • https://fijapirugonobi.weebly.com/uploads/1/3/4/3/134315317/1894905.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/9b951391-595c-484c-b68f-15779d91326d/16896729424.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0f365cb-f0de-4210-881c-842371c8d875/89069881217.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11222264-f69f-4888-bc71-1fc89a61583f/modelo_de_minuta_de_una_empresa_sac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb7c6ac4-82f8-439c-99da-a65869c8670a/16369261226.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fffd4b4-c35f-4070-a951-4ae307afa9a0/75376325736.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_off00012f48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F48 5564 bytes
SHA-256: cd4052ae423f6f4a1d57035a30d0b68a6477eb3ae1cdb4a45b2436af2fa6a7c8
font_01_sfnt_off00014262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14262 12880 bytes
SHA-256: 7353c4546dd5f5194927e5e35abfbe2a07af80eb82788662304b4f5bc025c851
font_02_sfnt_off00016d73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D73 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2

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