Malicious PDF — malware analysis report

Static analysis result for SHA-256 cab7c8d0c426c001…

MALICIOUS

PDF

68.0 KB Created: 2020-10-27 16:35:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c117a72642b5c5ce5c0763e7d712fa77 SHA-1: d82f68a8691f68b0d7ea9cf1c1f121f7b847bc5e SHA-256: cab7c8d0c426c001cad8f01b8a087b91fae0a1fac1aa326c885b7a2e443dfcdf
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 0.9878

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=neutral+stimulus+meaning+in+hindi In PDF document text
    • https://mamexobupelo.weebly.com/uploads/1/3/1/3/131383482/favorufavewivepeje.pdfIn PDF document text
    • https://bafovulik.weebly.com/uploads/1/3/1/0/131070506/siwekofiwiviz.pdfIn PDF document text
    • https://repugonajipivup.weebly.com/uploads/1/3/0/8/130814926/sesud_lijur_vezazu_kogobum.pdfIn PDF document text
    • https://raxuzorufureraw.weebly.com/uploads/1/3/0/7/130775378/pixidu-nekisiniwemavu-kovejiwevoki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366984/normal_5f9754c0a1eac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366666/normal_5f8721de1a350.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371786/normal_5f90b3b9ef834.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369183/normal_5f90f843d97a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387054/normal_5f8f73a9ed49e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382423/normal_5f925eb767abd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/cisco_command_line_reference.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/cambridge_english_pronunciation_dictionary.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/nitrogenase_enzyme.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/kagelitipemadaxalome.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/futetobuforaposexosesib.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/ielts_reading_question_types_and_tips.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/pdf_split_and_merge_basic_version_2._2._4_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/sociologia_resumo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dbf6ed5-68a1-4ea1-88c0-2605e6470ee7/nedesor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6824946-b655-4c82-8de6-6ea4a6395641/savidixebebekovokefuxoja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/769af822-cc31-4655-89f6-6c1c32a480b6/20437737167.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77faf744-3cf8-440c-b4ce-4c8ba3a557eb/fivevuwuxi.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 9

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C5A 3900 bytes
SHA-256: 5b92b62965201919d022a8db1970a00ca99fd0d49d5d142e76ea077b0a23727b
font_01_sfnt_off00006a3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A3D 5208 bytes
SHA-256: 6b551fe0bdfc9901fb27ce5389397cde224e40c36e27c9f54908580634e15be2
font_02_sfnt_off00007bc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC1 2656 bytes
SHA-256: 1620336da6018abf771a3b64a4739dbc5cc5761e5bcfd31f9568e9163b5e6178
font_03_sfnt_off000086c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86C8 2328 bytes
SHA-256: 6d897259d7ab9db79b0dbb16904cd99ff486aa7f4a475590a5d3e44eab6e0eed
font_04_sfnt_off0000917e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x917E 2108 bytes
SHA-256: b3976ad28991401f3a7e0d936621f3963ed8fd81aff5bedc9e25cf6548b1959b
font_05_sfnt_off00009b49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B49 6240 bytes
SHA-256: c73bc3e5049303e9dc67686ec1fa1009632d8a658371bf73f82aeaddc124cbc6
font_06_sfnt_off0000ab85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB85 11364 bytes
SHA-256: ad0b3c5e49b20343c7a97d013e4c89cd71a078a70c24eab570988aa4d02f674a
font_07_sfnt_off0000d273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD273 16652 bytes
SHA-256: d3bfa78d65c1b01afd240749b9877c84464ec9c1b4f89db362fe99e44dae3ebf
font_08_sfnt_off0000e9a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A5 5424 bytes
SHA-256: 01043a1b9745b58386824f6d6eec418a5509670251e937b34423e3fc2b77251b

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