Malicious PDF — malware analysis report

Static analysis result for SHA-256 684e403eef790a7a…

MALICIOUS

PDF

83.0 KB Created: 2021-03-25 14:41:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d28cc52d80398c3dfbd26159faf0aa30 SHA-1: e6995908a1a440c55c472030658a1248c1992d20 SHA-256: 684e403eef790a7a0192b2fad57ceacf349a476add453f27634eed32591c516e
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://botokaw.ru/strik?utm_term=par+quoi+remplacer+le+cognac+dans+une+recette PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4457560/normal_602e6ff347aa8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463785/normal_603e62f76309c.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/97512043171.pdfIn PDF document text
    • http://tadosuzewamu.medianewsonline.com/tosozojusozel.pdfIn PDF document text
    • https://libodarupebixab.weebly.com/uploads/1/3/0/9/130969674/3126914.pdfIn PDF document text
    • http://vuletotam.scienceontheweb.net/zifiwesewu.pdfIn PDF document text
    • https://lutovadefok.weebly.com/uploads/1/3/3/9/133997447/2862589.pdfIn PDF document text
    • https://feruzizujuvete.weebly.com/uploads/1/3/0/7/130775768/forato.pdfIn PDF document text
    • https://kofivenemiwelew.weebly.com/uploads/1/3/1/3/131380814/wuradozak_wologovusu_lexozifubabulon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489607/normal_5fe669876f947.pdfIn PDF document text
    • http://gipogup.sportsontheweb.net/what_are_the_different_types_of_agile_methodology.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402711/normal_5fcb2e26b43c3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://a8a2d6b8-6248-42a0-90a4-e25e421c2e59.filesusr.com/ugd/f63f29_b2ce56204a0f465fb2e44428fa508d8b.pdf?index=trueIn PDF document text
    • https://f039f7e9-c7fa-441d-bf3d-2f0e35d6be10.filesusr.com/ugd/80685d_8a8948a73d0549319b83bce267bb6e7d.pdf?index=trueIn PDF document text
    • https://5d9de69b-f80b-44d6-9c2d-9027806fef0b.filesusr.com/ugd/e26ad2_09080b69e7eb485e9fd6714eb7ba440f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/faxuwemajujalugofalita.pdfIn PDF document text
    • https://f55c6975-0091-4942-a106-dc80285e5f9d.filesusr.com/ugd/8a4248_ff5834e2b4c24f9995689a71674001ee.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dipafuxe/value_education_question_paper_for_class_6.pdfIn PDF document text
    • https://488a161d-122f-4e25-b35e-34d1d0e27b34.filesusr.com/ugd/bbc910_6bb403490fa74704b2101f9b4dd0ec7a.pdf?index=trueIn PDF document text
    • https://c01188fd-d8af-4b86-846b-090f7ecd58d8.filesusr.com/ugd/9058e5_b72fe638b7c34f858c3adfe478abf493.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wujodibu/tixegawugeponavi.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/pillsbury_cinnabon_cinnamon_rolls_nutrition_information.pdfIn PDF document text
    • http://jotudokizer.onlinewebshop.net/9571580641.pdfIn PDF document text
    • https://5e54824a-8208-41b0-8aeb-7c017e8cfb46.filesusr.com/ugd/f64db8_07ffb3ffd6fc4487a7ed79534ba2f516.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DB 5400 bytes
SHA-256: 470f67744a3d84c4cd336d2c39bc90d2bb6c7be6beec7dc23753b10523d38df8
font_01_sfnt_off00010617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10617 12856 bytes
SHA-256: d27b2a9114bf7f0d45cd5373d8a872c59c67b737e5b4c60e647ec56f5e8c3c2d
font_02_sfnt_off00012e43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E43 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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