Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3a5018ed2128609…

MALICIOUS

PDF

50.2 KB Created: 2020-10-27 08:54:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1e290a10ded86903cf3c0d2b4f8dbb1c SHA-1: df13bb53582e789ff91a62f306a5c4e38ab13f7e SHA-256: e3a5018ed2128609a577e2422acd3bb269004543aef5bdbf8300cd402122ad05
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://cctraff.ru/strik?keyword=men+don%2527t+love+women+like+you In PDF document text
    • https://majijajivetik.weebly.com/uploads/1/3/4/2/134265766/rirudarewir.pdfIn PDF document text
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/4401886.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/fubazewi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368246/normal_5f8bc0b6b71ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366319/normal_5f88ae8093104.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376371/normal_5f8f1b096afc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375896/normal_5f9673a100841.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380228/normal_5f91e595e2300.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/67bd7f89-43a9-423c-9888-c6aea79a3c39/84722690990.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/329cfea3-84c4-47b5-b0a3-e36f152dc974/what_is_a_hero_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d0b2036-df76-4038-b335-6d73e503d7fd/projeto_de_interveno_medidas_socioeducativas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14c9ffdf-4636-4676-9132-9edf3cebb3dc/62946136073.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7427/2408/files/jisab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8415/5553/files/jasutegakokis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0292/7003/files/38292496056.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/nejozojozofubajevabef.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/37009297994.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_off00007a79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A79 4724 bytes
SHA-256: f6f8d46c083a5ea314b4f74fdbd1b53266197f74b90e558a0f05091a2aa2e9b0
font_01_sfnt_off00008a9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A9C 10056 bytes
SHA-256: bf660fdee686d917e99a01cc540c8635e584b5c01261c90b19553b001353e5c5
font_02_sfnt_off0000ad08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD08 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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