Malicious PDF — malware analysis report

Static analysis result for SHA-256 c823dcc459354c8a…

MALICIOUS

PDF

62.0 KB Created: 2020-10-28 23:05:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e7d1955ad269500327e8ebeabeea0842 SHA-1: de039b8f96efefdbce8daeb97fa5dcf7e219a7d1 SHA-256: c823dcc459354c8a8757d2a1d79186ca0b4325331e42b470df2ba5a6e71fa76a
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=narrow+car+seat+convertible In PDF document text
    • https://voxapinave.weebly.com/uploads/1/3/2/7/132740917/mewobifobow.pdfIn PDF document text
    • https://fufosasoxesa.weebly.com/uploads/1/3/2/7/132740234/0e2da4f10.pdfIn PDF document text
    • https://gekeforoka.weebly.com/uploads/1/3/1/4/131438206/gixojulala-fuzonosa-lejabivugonoli.pdfIn PDF document text
    • https://reninifovebomul.weebly.com/uploads/1/3/4/3/134361606/9155621.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369506/normal_5f87d99fe2b85.pdfIn PDF document text
    • https://welavofewefose.weebly.com/uploads/1/3/0/8/130813025/1130783.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375357/normal_5f8ce6bac8f75.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/falufusu/65089138420.pdfIn PDF document text
    • https://s3.amazonaws.com/sanekufiwumafo/melovamepeda.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/handbook_of_narrative_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/81152804394.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/10129906455.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/airtel_dth_channel_price_list_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5022/8119/files/juxozasitexidige.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/rulapebawudusizufak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8167/8494/files/nuclear_power_plant_basics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4435/5739/files/apostila_de_calderaria.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/48767147472.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/20186772622.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/west_b_writing_study_guide.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_off0000b5a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5A0 5056 bytes
SHA-256: c614817cb029d66917c88d797de970e898092d71a0b4183d9893fdabf6923e0c
font_01_sfnt_off0000c6f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F9 10552 bytes
SHA-256: 99d1c8020b1099bf2c2978c62cb41a938b7d97f3df5eba0e208459642bb3b0cc

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