Malicious PDF — malware analysis report

Static analysis result for SHA-256 d427d33bb90692f8…

MALICIOUS

PDF

45.0 KB Created: 2020-11-06 14:45:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 80cdacad647f45d08b3829e39b78e651 SHA-1: 0ef3b23b23eaff0f6ee83b324d2005292792c86f SHA-256: d427d33bb90692f8059978b992d98e556618f7045325881038badf75a744365a
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://trafffe.ru/aws?keyword=words+with+the+stem+photo+meaning+light PDF link annotation
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/b4d0be56fe138ef.pdfIn PDF document text
    • https://mukozuzaze.weebly.com/uploads/1/3/4/2/134265885/b5ad4e077297d.pdfIn PDF document text
    • https://digufotunu.weebly.com/uploads/1/3/4/2/134266503/xumokujaje.pdfIn PDF document text
    • https://bugemimeme.weebly.com/uploads/1/3/4/4/134403979/8b0638d2938b9.pdfIn PDF document text
    • https://vatalinonabalix.weebly.com/uploads/1/3/4/2/134234662/pubugazajomabogopapu.pdfIn PDF document text
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/8762215.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://uploads.strikinglycdn.com/files/353e70c8-d37e-4ae0-969e-3d3d69320149/free_avast_driver_updater_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/903147ff-2ff2-40ec-ae9c-8432e63d1fa8/famepodidavatagejenoxapil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7fbcb8a-29a4-4330-b081-871e27442968/wii_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jaburirarov/east_baton_rouge_parish_warrants.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb71822d-fc8c-4f96-a92b-9d10ec8075bb/brashier_middle_college_calendar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb7eccd3-f2ba-4466-8f83-316772d2b8b1/tegesalawamubotenes.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6361 5268 bytes
SHA-256: e31733364564c57e308eb6ae17c35165d03f67ce298afe4c419222c3f370842e
font_01_sfnt_off00007536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7536 10532 bytes
SHA-256: 0f464fac35a5a92133b89fb10e516bc4a553736cbefa8c8cb4b30b0af4b5a307
font_02_sfnt_off00009904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9904 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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