Malicious PDF — malware analysis report

Static analysis result for SHA-256 dccda323642e7978…

MALICIOUS

PDF

41.2 KB Created: 2020-11-07 22:09:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 30e44d5e996a81c19cb9383262e161bb SHA-1: dbfda3c68cd3c33eaead76e0cc8f7927a8e1ae52 SHA-256: dccda323642e79785ec630ce91c7e30aff290b6db73c32fbb469c415bd6ac2a3
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 1.0000

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://trafffi.ru/aws?keyword=tomorrowland+2020+lineup PDF link annotation
    • https://fevixivosetakub.weebly.com/uploads/1/3/2/6/132681861/02a3c751bcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385633/normal_5f914647979dd.pdfIn PDF document text
    • https://rikidunojig.weebly.com/uploads/1/3/4/4/134488605/3592162.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425916/normal_5f9e467b40a11.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/badefuromaguxupadipo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428033/normal_5fa1b06049b03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393020/normal_5f9eb7e57eed8.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/batuxa.pdfIn PDF document text
    • https://wilofera.weebly.com/uploads/1/3/4/4/134488721/2e03fd.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/5473886.pdfIn PDF document text
    • https://vutameko.weebly.com/uploads/1/3/4/5/134576445/e8cc1ab73a671.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/xezonijida/india_all_state_chief_minister_name_list_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/dofuwanalonegufasijokil.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/casii_scoring_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/tv_guide_bowling_green_ky.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_off000060f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60F2 5240 bytes
SHA-256: 9874a3993192ecd932ef54fe1661e927784f2730377c1513ed60cbd590400553
font_01_sfnt_off000072b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72B9 11084 bytes
SHA-256: c7513a0511a41504f34fa9926b0e5651c18ce2722ed4090ebefb65f0868a16cf

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