Malicious PDF — malware analysis report

Static analysis result for SHA-256 04a515420be9ec63…

MALICIOUS

PDF

46.4 KB Created: 2020-11-05 05:31:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6f90eacac5e3c4ea950858986f844a06 SHA-1: d8e0a115ce90b5ccb7e0d831076ded2aa2791d77 SHA-256: 04a515420be9ec63b3c2ecc6dbb512a082dd1c6020185cdfd7bb31cb5e83220a
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://cctraff.ru/strik?keyword=burning+rubber+4+play In PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/3079835.pdfIn PDF document text
    • https://penulikadima.weebly.com/uploads/1/3/1/4/131482887/2734f5d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369629/normal_5f8e1f7912f6a.pdfIn PDF document text
    • https://saloramorolo.weebly.com/uploads/1/3/4/3/134307331/5252802.pdfIn PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/godoto-jubovebivowoze.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/netajexotikawita.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409114/normal_5f93ec2c5805a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410201/normal_5f9b78cd517c7.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sinadi/aprendiz_de_brujo_libro_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d7cf7fd-31cf-4063-9a1f-ac480bd34004/wetesajalup.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/subaru_power_washer_2700_psi.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/mathematics_grade_7_exam_papers.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/wepevopejot.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/apartheid_laws_in_south_africa.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/85666523029.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_off00006c61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C61 1604 bytes
SHA-256: d683d182ef3abab539985d31a3fc94c9a55e7e2bd9c915c21b52eec23111cc52
font_01_sfnt_off00007471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7471 5188 bytes
SHA-256: 7a3144998b2003c8248c7d3a70a1e28b950d72d06051812da73a1c1733631a71
font_02_sfnt_off00008635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8635 11224 bytes
SHA-256: 63d838a78311007ce96b3337b29820623dd4d4adb3bb142f12c59b5dcbee7c14

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