Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4592a0a3b0ed23f…

MALICIOUS

PDF

54.4 KB Created: 2020-10-31 19:34:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: eae9e29da4a1f3d7754f3ef041b4b945 SHA-1: 297afa7a9a612b4e1a174b5827f1631a45e57ce8 SHA-256: d4592a0a3b0ed23fb2f31f0ce3be6128fc5ff05acfddb74b4f2f370333384a09
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 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://ggtraff.ru/aws?keyword=corvette+body+kits+dubai In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369161/normal_5f90fd7987cca.pdfIn PDF document text
    • https://fefaxositepimu.weebly.com/uploads/1/3/3/9/133986539/aad83416.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368736/normal_5f87c00b699cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369646/normal_5f8a6f9362520.pdfIn PDF document text
    • https://fejamelaluboj.weebly.com/uploads/1/3/4/3/134311679/243189.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/jasamejug-jenutuzudemeluf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386076/normal_5f8db91c20867.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/9541755.pdfIn PDF document text
    • https://fasuwilobavofe.weebly.com/uploads/1/3/4/4/134489762/ludedonuxagawob.pdfIn PDF document text
    • https://lasomuvexovip.weebly.com/uploads/1/3/0/8/130813571/jutos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369494/normal_5f8a7694e74b9.pdfIn PDF document text
    • https://nakumupapetiz.weebly.com/uploads/1/3/2/7/132741615/suwufepedititux.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://s3.amazonaws.com/wilugugo/2185744643.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/28150201462.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65CA 4952 bytes
SHA-256: dc897e705b687d749d904b5187a4fa9ecf4c29b7a3bf7c198c10789f12890662
font_01_sfnt_off000076bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76BD 2740 bytes
SHA-256: 95d3c26729f39c037b227f1a3db53cd07cdb17307cf8c542c049317f397a5201
font_02_sfnt_off00008266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8266 10388 bytes
SHA-256: 63dfc6c89cfe786f77554ca696017f535a0e663f6d227015824f095b04062c99
font_03_sfnt_off0000a5d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5D7 17040 bytes
SHA-256: 8766e97fccf506eb630421e2f6c0537c9033f1e72b0a907289316ddd45923d83
font_04_sfnt_off0000be04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE04 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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