Malicious PDF — malware analysis report

Static analysis result for SHA-256 116ef9a374283bc8…

MALICIOUS

PDF

77.5 KB Created: 2021-03-28 23:43:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 29a835c57b640b06f7e33fe4097ffa77 SHA-1: 53d94cb3dd2301b0638f987021e44266070172c1 SHA-256: 116ef9a374283bc8dcb9b83cbabfae5c5bac7f451fcded179227bfcc339132dc
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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/wix?keyword=to+whom+it+may+concern+letter+samples PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4478438/normal_60269264ee4e5.pdfIn PDF document text
    • https://kojaxinepizoju.weebly.com/uploads/1/3/1/8/131856409/c2814a.pdfIn PDF document text
    • https://vonenubu.weebly.com/uploads/1/3/5/9/135964133/nozezojanaso.pdfIn PDF document text
    • http://kavakedego.scienceontheweb.net/the_complete_cbt_guide_for_anxiety.pdfIn PDF document text
    • https://rabuwamefikulo.weebly.com/uploads/1/3/1/3/131398373/lobibikamebipapow.pdfIn PDF document text
    • http://tuderoba.getenjoyment.net/72424871526.pdfIn PDF document text
    • https://jesepivop.weebly.com/uploads/1/3/1/4/131483445/5185449.pdfIn PDF document text
    • http://mizarujil.mypressonline.com/48200106426.pdfIn PDF document text
    • https://wewowalowumuv.weebly.com/uploads/1/3/4/0/134040384/6261432.pdfIn PDF document text
    • https://lekifusa.weebly.com/uploads/1/3/1/3/131382118/76020b3dacf.pdfIn PDF document text
    • https://xujebope.weebly.com/uploads/1/3/4/0/134018561/9356413.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448551/normal_6034430bc2a17.pdfIn PDF document text
    • https://biwiporiv.weebly.com/uploads/1/3/4/6/134620494/jafobapakaxuduru.pdfIn PDF document text
    • https://lilufegat.weebly.com/uploads/1/3/5/9/135965666/f6473c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411246/normal_6050f148376ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450502/normal_601ee902b610f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/vibododipufikisu.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/sharp_alarm_clock_manual_walmart.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/java_programming_interview_questions_for_freshers.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_off0000f2d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D3 5316 bytes
SHA-256: 712d78f6217b0d83c2817a69a042418e2493218a5aa6c4fd8b4294561613a55c
font_01_sfnt_off000104cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104CF 10816 bytes
SHA-256: ea3b6d3619b942ae8ba9c36b427afe79b7ad068be36c49ffcb3285af6af1b337

Open this report in the interactive analyzer, or submit your own file for analysis.