Malicious PDF — malware analysis report

Static analysis result for SHA-256 070234752241f0ef…

MALICIOUS

PDF

44.0 KB Created: 2020-11-04 23:27:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3bbf482a1333f20b2e63383752358431 SHA-1: d9f230c9405fb691dc8fff1a5ac02dad2e503b44 SHA-256: 070234752241f0efd193ad048831952d8df458fd83f53e32b240fa867faaa705
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://gettraff.ru/123?keyword=ff14+mine+serpentine In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384642/normal_5fa0f67310852.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427077/normal_5f9f83539ccee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414487/normal_5f9676b72f787.pdfIn PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/1535559.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/b4b3eb38b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410953/normal_5f99a7ef8864f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370304/normal_5f8f9ffe05512.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370087/normal_5f90050c9f296.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459784/normal_5fa1fc11aa046.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369909/normal_5f95882037eae.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/bezegoluzose/acta_constitutiva_asociacion_civil.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/rusd_school_calendar_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/jugomuxure.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_off00005858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5858 7164 bytes
SHA-256: 0373f433bb6e819942f820059823e897d023d918e1bcffc2664c6eabe415c7a2
font_01_sfnt_off0000702a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x702A 4900 bytes
SHA-256: b4e98e588eeccf0fbce2a66c4cf801cc7f5e02e02662058fcd725420f52de74c
font_02_sfnt_off000080d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80D2 10104 bytes
SHA-256: 596a5fc03ac0eb84d5c3eb88440c910b54e55a3617f7d258d978c823638bab0a

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