Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a074565ebd54439…

MALICIOUS

PDF

68.3 KB Created: 2021-03-09 10:49:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 54a4790b47abd6725ef321bdcfe1a1af SHA-1: 96ada2267cb12eaaeeb644d5d7a1fc997f8179c9 SHA-256: 0a074565ebd544393e4e92288da11d85cdab2ee41fe41480d94b26e477a730b8
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and 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 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/aws?utm_term=te+amo+con+todo+mi+corazon+translate+in+english PDF link annotation
    • https://binolopokam.weebly.com/uploads/1/3/1/4/131484395/d5c387a119ad.pdfIn PDF document text
    • https://gujuxufun.weebly.com/uploads/1/3/5/3/135398829/lebizoxobufakituki.pdfIn PDF document text
    • https://ximetekorexuven.weebly.com/uploads/1/3/4/4/134489871/000d3b2d21.pdfIn PDF document text
    • https://nakidero.weebly.com/uploads/1/3/4/5/134524904/galener.pdfIn PDF document text
    • https://tizidebiwefixim.weebly.com/uploads/1/3/0/7/130739379/c2a6e.pdfIn PDF document text
    • http://bukibiroxofin.22web.org/dinosaur_king_arcade_game_for_android.pdfIn PDF document text
    • https://reratuzofi.weebly.com/uploads/1/3/5/3/135346135/3400009.pdfIn PDF document text
    • https://tefafovok.weebly.com/uploads/1/3/4/5/134588422/geluwijatubi.pdfIn PDF document text
    • https://pesenulowujef.weebly.com/uploads/1/3/5/3/135325158/9d2a6daab43ded.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/pasawe/pajudobuwunono.pdfIn PDF document text
    • https://2ac56fc1-f7ee-4366-9cb2-1681469c68ee.filesusr.com/ugd/b914b5_b134201a01014db78467471c8243a2b2.pdf?index=trueIn PDF document text
    • https://d86ad34a-7df2-4f47-937b-a12ab5abc0fa.filesusr.com/ugd/8cbfce_0a0eccb367e44c378e02af4deca089c1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lazesej/lajoraxevolukewe.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/21964379894.pdfIn PDF document text
    • http://kiluxelatax.epizy.com/wulob.pdfIn PDF document text
    • https://184d393c-d2ff-49e5-bbcb-48626b1dbf88.filesusr.com/ugd/49be48_3fce89d5aad64f0a9e077c3a593ee759.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/bertoldo_bertoldino_e_cacasenno_libro.pdfIn PDF document text
    • https://45ae50e1-98a8-4501-9ad6-fc0df438eb43.filesusr.com/ugd/b16523_58e58cd08c6a42688bde0e6d09cba8c2.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD72 5352 bytes
SHA-256: 616c1fb9b9e697d79b939a180b75c73063db8ae5db3a87fc80171e687cf4fddf
font_01_sfnt_off0000df7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7A 10980 bytes
SHA-256: 7c688d82cb738acb0eb2dd289a9aac1f25a59e6cbe8fa291821d7fe89b810f9f

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