PDF malware analysis — malicious · c130757d883df6a2

MALICIOUS

PDF

76.5 KB Created: 2020-10-26 09:07:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04

MD5: 69018a6636642368af66c38354dd76a0 SHA-1: 14b55cf8d82694f7bccfe3547d8fa02617021b1e SHA-256: c130757d883df6a255cbc8e879990420dfc3d135cbc13cdf18059cef78de57a8

194 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses an MFA/2FA-themed lure. 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 0.9999

Heuristics 5

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.
MFA / one-time-code harvesting lure high SE_MFA_LURE

Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
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://ttraff.ru/123?keyword=oyster+3+pushchair+instructions In PDF document text
- https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/26c4f6b1d143.pdfIn PDF document text
- https://jugoruzaja.weebly.com/uploads/1/3/1/4/131407370/botosogumudawa-rubidowapelu-nevapijeroja-zomodekulug.pdfIn PDF document text
- https://radisowe.weebly.com/uploads/1/3/4/3/134366404/cef9b2c9b0349.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/subud/44410580547.pdfIn PDF document text
- https://s3.amazonaws.com/wotodedaruzuk/madimetisubijegujutowot.pdfIn PDF document text
- https://s3.amazonaws.com/tadovu/zuvuvikugomobolo.pdfIn PDF document text
- https://s3.amazonaws.com/vixuwogetiv/26558697700.pdfIn PDF document text
- https://s3.amazonaws.com/vogubivajavofu/ncert_accountancy_book_class_11_part_1_solutions.pdfIn PDF document text
- https://s3.amazonaws.com/vuzufexarevima/types_of_paper_airplanes.pdfIn PDF document text
- https://s3.amazonaws.com/zuguvoxoki/design_methodology_in_architecture.pdfIn PDF document text
- https://s3.amazonaws.com/zirojopemup/nodufakugalawide.pdfIn PDF document text
- https://s3.amazonaws.com/ditiruz/gaxidaresojij.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/efc381ef-d6d5-47a7-8f77-8fce80e18f25/23688701509.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/04be21ad-6192-4969-9ef2-aedd3aa143e3/74250116837.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cb804651-a9ba-4ae0-9233-2b6daeb7163e/download_soft_ft_wizkid_money_remix.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/95917719-e684-4c0f-ade3-e3baaedfd864/jefirafifesafinepirupu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/fcebe634-0a23-4496-8d1e-0f9b601c4804/the_first_time_movie_download_fou_mo.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0496/6327/9253/files/zara_man_jeans_size_guide.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0485/3222/6203/files/wobuganobufuvo.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0478/3957/6223/files/labob.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0397/9332/8315/files/actividades_para_fomentar_valores_en_adolescentes.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/afa7c372-b023-47ba-8c3f-cf54545acb02/2099604344.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9de66524-eda7-4788-b435-0b3d26a350cb/xowuzerigexiri.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000def3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDEF3	2968 bytes
SHA-256: `1c91280eb79ffdc858b6ecd2b9b1b9121e398c569f5702dd47e27479ee3b0056`
`font_01_sfnt_off0000e999.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE999	5284 bytes
SHA-256: `d8825bd251bd924ae826862ecb5836d74e02b30320e443cfc3754ad7dddfa268`
`font_02_sfnt_off0000fb8b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB8B	11416 bytes
SHA-256: `8a66dddc2c58230406270e076d893e1fcc767e4697877ea36cb600fc566f25c7`

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