Malicious PDF — malware analysis report

Static analysis result for SHA-256 7367a2eabe295192…

MALICIOUS

PDF

48.9 KB Created: 2020-11-05 10:48:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e2ce99bba6003a974436a10aee1df93c SHA-1: 14d3006cfca8e6d7c1ae02334bfb9ad21573a7e5 SHA-256: 7367a2eabe29519263a3001ab34b21b869e664e8f85fe024780e217aaf4bb890
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://gettraff.ru/strik?keyword=free+spider+man+homecoming+full+movie+online In PDF document text
    • https://fupexorugukemig.weebly.com/uploads/1/3/0/8/130814763/468d3abe39f.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/6f984.pdfIn PDF document text
    • https://papokerudinex.weebly.com/uploads/1/3/4/3/134310480/zidesebapobivok-tevinemolamazi.pdfIn PDF document text
    • https://nujidigazinuwag.weebly.com/uploads/1/3/4/3/134318548/xojewuwugerosug.pdfIn PDF document text
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/gaxapuzimiz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/4061730731.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5ccaee7-371f-41b0-a5a8-e377bb49231f/talavilawibekidelifosi.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/gifas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69ed0b67-093b-4424-b8ee-d1adb3896775/gekazusu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e8a3e56-7252-4da3-b99d-d3899caa1c1d/napawagudegasegoxam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec1b7865-2ddf-478a-87f0-2eacfed5be5f/72352268097.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b85db69-de62-43ad-b745-501358269852/shelter_harlan_coben.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/67923279749.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/fadawemimuduxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/695c0223-04f5-494f-a81f-cce567d4b04c/nextiva_phone_app_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/67027300353.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_off0000743c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x743C 5584 bytes
SHA-256: 3d78664559768cd827a874ad95c6deb5822b125f8f8324b433a0efdbf335928b
font_01_sfnt_off00008713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8713 1948 bytes
SHA-256: d4c28e351106b485bb452b8c3d52ae4032fb34fffb029db96304f01691da906c
font_02_sfnt_off00009064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9064 10852 bytes
SHA-256: 8ad580e81c4f13ed96188d4465ed85283242eedfa2555dbf8e764bb538783ea9

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