Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f76f30b3de3a984…

MALICIOUS

PDF

41.1 KB Created: 2020-10-05 06:33:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 95b8e17e3aca229f8ebb22a99c79600c SHA-1: 07e518dabe2af9995c6b3cf9bd4d6638b9e88f1e SHA-256: 8f76f30b3de3a984b2a0d6fdc1a8af9083d50dd294cf13a5acd9dabc8a9550f8
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?keyword=the+art+of+the+short+story In PDF document text
    • http://files.plughugger.com/uploads/1/3/0/7/130740133/woxawutuvepibez.pdfIn PDF document text
    • http://bivili.ohvintrkjam.com/uploads/1/3/1/4/131483108/152245d5.pdfIn PDF document text
    • http://files.flowersindeed.com/uploads/1/3/0/9/130969525/manozoripogure-gukopuxaf-tatinod-rewijonawiriti.pdfIn PDF document text
    • http://files.imaginebetter.shop/uploads/1/3/2/6/132696580/siluwukepa.pdfIn PDF document text
    • https://site-1037920.mozfiles.com/files/1037920/kutexez.pdfIn PDF document text
    • https://site-1036640.mozfiles.com/files/1036640/radoleborifejelarorob.pdfIn PDF document text
    • https://site-1037018.mozfiles.com/files/1037018/raxejo.pdfIn PDF document text
    • https://site-1037079.mozfiles.com/files/1037079/75952562506.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c55dbb5b-9021-4018-bd65-00fbedf52935/xutopirir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/515e5a8d-eacf-4262-b539-0b42cfd49adb/55681100957.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c6dd76a-47d4-401f-9c1f-e90291b985fb/rulevutiduk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcaa0f08-7d2d-4b7e-8239-72010f217c34/53189914148.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebe456c3-1b1d-4c68-89b7-477bf05f7f29/bogunexabubosepaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b0ca7f0-c4af-4191-90f2-bb81afff8fa7/kukavikexitizafuvaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd303f63-9063-43bc-a3be-a08358ae47c3/72361360504.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/324b716d-3455-43c1-ae2f-5ae26a6bd308/kujuwuvijiki.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_off000064e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E6 4876 bytes
SHA-256: 9abe21b1b3f7cbbd83e894a1f98a665f56b4dbd4650b54b348bc55e219c9d264
font_01_sfnt_off0000757a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x757A 9996 bytes
SHA-256: 231fcf5b8f846a3d85215a5766a165bdde4baa71403218b46f633bc0d1a74cbb

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