Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce5c5826412547fa…

MALICIOUS

PDF

81.1 KB Created: 2021-02-22 23:54:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 01077d98c235ab022fd38fad2c0525c1 SHA-1: 6c12edc2638cef654d0cb8453a93b89127f22070 SHA-256: ce5c5826412547faa6a74a178aa0bbd8440515a327a53a2f846575dc21c56169
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous external links, with a heuristic specifically identifying a 'PDF_SEO_LINK_FARM'. The primary external URL observed is 'https://baarspo.ru/aws?utm_term=husky+pro+air+compressor+60+gallon+3.2+hp+parts', and another significant link is 'http://latujor.22web.org/45217142538.pdf'. The ML classifier strongly indicates maliciousness, suggesting the document is designed to redirect users to potentially harmful content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://baarspo.ru/aws?utm_term=husky+pro+air+compressor+60+gallon+3.2+hp+parts PDF link annotation
    • http://latujor.22web.org/45217142538.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369654/normal_601154d2de800.pdfIn PDF document text
    • https://zufezoro.weebly.com/uploads/1/3/4/8/134885884/fepari.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501794/normal_60315d4992610.pdfIn PDF document text
    • https://cdn.sqhk.co/bitenutugiw/ijjiagc/shortcut_to_access_device_manager_in_windows_10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499984/normal_5fff59a43f27d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471467/normal_6021406b31b2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467300/normal_5fdb1e8f516d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473947/normal_6013bb0ad6adc.pdfIn PDF document text
    • https://cdn.sqhk.co/piredonina/grtvGie/27518436442.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/lunojol/45691429482.pdfIn PDF document text
    • http://gataluxogawix.epizy.com/physician_burnout_report.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/67153911786.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_off0000fd4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4E 6100 bytes
SHA-256: 4a952b9a4cd62e0ab187f6beb47bf97059ca453b22212c55acd683aaa9930228
font_01_sfnt_off000111ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111EF 10968 bytes
SHA-256: db221cc65c58d79cd25ad6909d5b532179c4f28ba2c276b8acf6a7180a58214c