Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cbcd40b9d56aabf…

MALICIOUS

PDF

48.3 KB Created: 2020-10-26 23:46:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 005d080f214bf37603082c669fca1500 SHA-1: 2142724080c01b86e40e0b91dfba95f8f6b50738 SHA-256: 8cbcd40b9d56aabf7e0f28495d491a1d97da1761d4fae66c2dd9380d1f0c13af
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://ttraff.ru/123?keyword=sculpting+in+time+pdf In PDF document text
    • https://xelenupexom.weebly.com/uploads/1/3/4/4/134480667/2279899.pdfIn PDF document text
    • https://gewosawoma.weebly.com/uploads/1/3/0/7/130739201/papopeko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374847/normal_5f8dddaee3cf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f875a38eccce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367667/normal_5f874d8c30d6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402951/normal_5f944c1957abb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374360/normal_5f91515a5ba35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377925/normal_5f8e5fc62d515.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377116/normal_5f89efd32e205.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383698/normal_5f950a8830a36.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c21da13a-f50a-4c51-a155-97c4e94fa1de/java_concepts_early_objects_8th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9994f4c-3d3f-4248-8c5e-b778184c4dc7/49960393270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31d70494-8888-4831-a22b-495302c6a874/fichas_de_lectura_para_imprimir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2cb2b6a-b3cd-4742-aba3-1b5eb39fd760/98706312352.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71e285d9-c677-4c84-8406-2d4aaffcb390/69563770711.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4078/3008/files/self_employment_income_calculation_worksheet_for_mortgage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1734/7489/files/28438017335.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6358/1090/files/sotex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/287cac42-bdd8-486f-9579-bb8eec8f8f37/bupokepupugijatekedises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae028399-93b6-4339-afca-d4a5deb08a0e/xenoveda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d6ceb9a-5078-4172-9fb5-1357403ed181/driver_manual_in_russian.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1882fedb-e467-49f2-b94f-89932e9324fb/vovojogelo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C6D 5092 bytes
SHA-256: d9fe289ead82e4f16994012d18b98b071be9e11cb43ddcf6852325dabe394481
font_01_sfnt_off00008db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DB2 11348 bytes
SHA-256: 7bd6a1bf16df749efb1ae19e68dbb8961ed214d3b67dd20c9685f4e4ab2ba053

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