Malicious PDF — malware analysis report

Static analysis result for SHA-256 43a8d7a397d1e023…

MALICIOUS

PDF

44.9 KB Created: 2020-11-06 09:06:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1dd6b9303604ac0d36f1f00be910ee0b SHA-1: da98075c8ce89428d5be90c6c2430f46b10496c0 SHA-256: 43a8d7a397d1e02338e9a61b750dc1c848c0ed994a323bce6525f547f4cc3ce2
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://ggtraff.ru/123?keyword=tobin+library+voting+hours In PDF document text
    • https://jikajulimag.weebly.com/uploads/1/3/4/3/134319013/nimavepiz_wemoviwuvakig_gikujufolizugip_xifisifemodetum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376382/normal_5f93ea40933dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417413/normal_5f99458ee1928.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/fizosudusozi_virirajam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405945/normal_5fa0c0092c7a2.pdfIn PDF document text
    • https://jopalezaleloloj.weebly.com/uploads/1/3/1/3/131380469/3160116.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/fa448.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369185/normal_5f8c21826b5b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376611/normal_5f9e51b5b0dd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426945/normal_5fa4e5a4a719a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405642/normal_5f993b670f910.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365662/normal_5f873290ee4fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367921/normal_5f88749ec158f.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/varoximu/tevebitux.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/read_harry_potter_online_free_book_7.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_off000060f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60F4 4960 bytes
SHA-256: 92abd21dd8146997d0cd9c0c001106153bca16200f08d48875e62e64a02b0316
font_01_sfnt_off000071c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71C4 12056 bytes
SHA-256: e3a8aacf0df85b70b7646eba740ece7b078ac14bab25380b859050e82e1c29e7
font_02_sfnt_off000098d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98D3 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

Open this report in the interactive analyzer, or submit your own file for analysis.