Malicious PDF — malware analysis report

Static analysis result for SHA-256 d09c99961fd3351f…

MALICIOUS

PDF

48.4 KB Created: 2020-11-09 02:53:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ca8171aee84c2e44856a2ca6c5fdbc9a SHA-1: dfaf03e49843cf1dc38356e6e55fa104dc7c0b69 SHA-256: d09c99961fd3351f434284de0cb8a969efc0c505685e22ab5755bc1e8407ca3f
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://traffmen.ru/123?keyword=our+cartoon+president+season+1+dvd In PDF document text
    • https://rozazokosu.weebly.com/uploads/1/3/0/8/130813972/mipuwerofav.pdfIn PDF document text
    • https://sesuwulot.weebly.com/uploads/1/3/1/4/131438847/bagisegodex-famasunaxuku-bugofotebisig-sisajiriwa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455174/normal_5fa174dabca02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371247/normal_5f9904badab14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418197/normal_5f9d02a87db40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418185/normal_5fa2679177755.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f874b2f235f8.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://uploads.strikinglycdn.com/files/2c6ae059-f9eb-4d39-8949-b6cc061bdb16/galuxaxuzitujuj.pdfIn PDF document text
    • https://kasujakomo.files.wordpress.com/2020/11/xojuwapolujupus.pdfIn PDF document text
    • https://pafegum.files.wordpress.com/2020/11/xumakosokidazok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/614583cc-2e2a-48ce-b9a2-fd5862c29ed2/nasutikowasepifimidaluwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2f22488-dd16-4907-a372-baa1c0396fc4/51030671713.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c5aec38-aac5-4795-ad39-707499691804/42000672717.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_off00007198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7198 5056 bytes
SHA-256: cd87a9d267e7950b9e053d8c8fd7fa2623c4893e3c52e1bddb968953ac7815df
font_01_sfnt_off000082db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82DB 10536 bytes
SHA-256: 4920f09d977dfe9458d4f0e52aae95931deca0eee4e87f8fd8960b9d6d36c5da
font_02_sfnt_off0000a6d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6D2 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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