Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5cb84eb2705cc38…

MALICIOUS

PDF

40.6 KB Created: 2020-11-08 10:14:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: fadd59f2a858b53c0d95cc8a38688569 SHA-1: 7bf51bf865636b8cf0742979a2be1de1b0eb9f46 SHA-256: f5cb84eb2705cc385de7ebdded97bef9452393ae49e57b14319efed5405d4d01
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://traffking.ru/aws?keyword=happy+wheels+demo+unblocked+games+77 In PDF document text
    • https://viwezoluzuwa.weebly.com/uploads/1/3/4/4/134401695/99ac67ed33.pdfIn PDF document text
    • https://tirepululavapiw.weebly.com/uploads/1/3/4/5/134576363/9336631.pdfIn PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/robiruzekukebujog.pdfIn PDF document text
    • https://mepopuwiv.weebly.com/uploads/1/3/4/4/134499337/16b80b8.pdfIn PDF document text
    • https://sowameneritela.weebly.com/uploads/1/3/0/7/130775755/vijirawemoxelit-vukowo-kixikototexaj.pdfIn PDF document text
    • https://fipaziditude.weebly.com/uploads/1/3/4/4/134465794/aa500454d.pdfIn PDF document text
    • https://sevivuninuk.weebly.com/uploads/1/3/4/4/134459749/retajes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://jusakob.files.wordpress.com/2020/11/sopexijug.pdfIn PDF document text
    • https://wezodik.files.wordpress.com/2020/11/52678004016.pdfIn PDF document text
    • https://bewujus.files.wordpress.com/2020/11/fm_approval_guide_building_materials.pdfIn PDF document text
    • https://lukarilovaj.files.wordpress.com/2020/11/32324087995.pdfIn PDF document text
    • https://watupep.files.wordpress.com/2020/11/nozaxibo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ba869bb-5291-4a8c-99bd-365d8c62441a/24627327752.pdfIn PDF document text
    • https://sebuwisawos.files.wordpress.com/2020/11/fipupojuretis.pdfIn PDF document text
    • https://rimofugu.files.wordpress.com/2020/11/71906757431.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_off00005f07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F07 5832 bytes
SHA-256: a327dda76c804bb38b8a8ec972ada1b585a4b80a0b9a949726dd862718a9096e
font_01_sfnt_off000072d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72D4 11168 bytes
SHA-256: aba345382a6f383919fc6188c5d9073b2fc880e0317c875bb5f61101824a8f53

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