Malicious PDF — malware analysis report

Static analysis result for SHA-256 3947be5882fab78f…

MALICIOUS

PDF

50.2 KB Created: 2020-10-28 23:14:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0656e8f853662c3c9430bb18a478eeed SHA-1: 9b221733c1bee229edebecffaf5b38e7426cfa35 SHA-256: 3947be5882fab78f92ae7d204b6b6a06577e917d92f12ee6b1ebde0d20b65e87
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic identifying one as a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'urgent care' and a URL that aligns with the redirector heuristic. The presence of numerous external links suggests an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes.

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://ggtraff.ru/aws?keyword=urgent+care+of+atascadero+atascadero+ca
    • https://cdn-cms.f-static.net/uploads/4403260/normal_5f91161d991b3.pdf
    • https://rujasuxok.weebly.com/uploads/1/3/1/6/131606047/vediroju.pdf
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/6104943.pdf
    • https://cdn-cms.f-static.net/uploads/4384308/normal_5f9253171ceb8.pdf
    • https://cdn-cms.f-static.net/uploads/4367312/normal_5f8d10eee0be0.pdf
    • https://cdn-cms.f-static.net/uploads/4366993/normal_5f974a09a12e9.pdf
    • https://sazojowob.weebly.com/uploads/1/3/4/3/134351878/99fcdbb747ad019.pdf
    • https://fevixivosetakub.weebly.com/uploads/1/3/2/6/132681861/ffa66d1.pdf
    • https://cdn-cms.f-static.net/uploads/4366655/normal_5f8905724a86a.pdf
    • https://cdn-cms.f-static.net/uploads/4370092/normal_5f923bda4ba78.pdf
    • https://jefogozadiz.weebly.com/uploads/1/3/4/0/134040800/xijutina.pdf
    • https://widubemevojapo.weebly.com/uploads/1/3/4/3/134320166/vazipoguwadowun.pdf
    • https://cdn-cms.f-static.net/uploads/4384822/normal_5f96e823e575d.pdf
    • https://cdn-cms.f-static.net/uploads/4386361/normal_5f8e023937858.pdf
    • https://jofetafoba.weebly.com/uploads/1/3/4/4/134485710/wuxekatoneru.pdf
    • https://kemumapuvepuvi.weebly.com/uploads/1/3/4/3/134311950/mejesib_roxij_bukitipex_vorawunabinixow.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0500/9988/0099/files/ixigo_live_train_status_apk.pdf
    • https://cdn.shopify.com/s/files/1/0504/7078/1103/files/schwarzkopf_live_098_instructions.pdf
    • https://uploads.strikinglycdn.com/files/8e984d17-c111-4488-90a0-00b4cdc6befc/lusoleb.pdf
    • https://cdn.shopify.com/s/files/1/0500/4276/5511/files/60840923825.pdf
    • https://uploads.strikinglycdn.com/files/41573650-de41-4a48-86be-5b7191f33db1/keror.pdf
    • https://uploads.strikinglycdn.com/files/17345da4-51d3-4759-adac-bf5218b79a8d/xolilafezoruxax.pdf
    • https://uploads.strikinglycdn.com/files/3613d2f4-41df-46ce-8cb4-b60fc18556f9/kujuviboxubopikitiza.pdf
    • https://cdn.shopify.com/s/files/1/0266/9677/7907/files/66952150706.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000769b.bin
bfa333f1dcbd7937b2db846ee686a962dfa8051d3cfabf2a86911d3cdcf3e857		 pdf-font-stream PDF embedded font (sfnt) at offset 0x769B 4888 bytes
font_01_sfnt_off0000873a.bin
a75c336211658b21c9c85906acff6a0d42c2dccae67a0f4eb218be944d5684c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x873A 11020 bytes
font_02_sfnt_off0000ac60.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC60 4324 bytes

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