Malicious PDF — malware analysis report

Static analysis result for SHA-256 f56b18f8b274d0dc…

MALICIOUS

PDF

42.8 KB Created: 2020-11-07 11:10:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: eb17828d998e5316e65a8bb7c1916bed SHA-1: 0a7117af55713b279da702b4fcfbad6ca77e4a37 SHA-256: f56b18f8b274d0dcf1b3e5af57e5d2f25a23ba8dafae6fddea7cefed3622458c
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafficel.ru/aws?keyword=2000+mitsubishi+montero+sport+repair+manuel PDF link annotation
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/5cb32b3a7f.pdfIn PDF document text
    • https://lusukukupesakub.weebly.com/uploads/1/3/0/8/130815137/1bbe22087f4.pdfIn PDF document text
    • https://nuzixusimupe.weebly.com/uploads/1/3/4/3/134306281/babuku.pdfIn PDF document text
    • https://rupunapu.weebly.com/uploads/1/3/4/3/134354814/sejitogax_sijape_nuzudugedeko.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/sixukejomiwewanage.pdfIn PDF document text
    • https://wabemogulumog.weebly.com/uploads/1/3/4/3/134384503/fecc72508.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/e52f92e7-dcd0-4c12-95cc-0cc492bdbbf0/29247549481.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/zivadorosotoneduvariva.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/amp_simulator_pedal_bass.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/lcd_tv_toshiba_24_inch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28b07155-c0c1-4100-bb8a-46db9f1c014e/newalebisonipat.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_off000066e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66E6 5376 bytes
SHA-256: 25daf2bb0e616f706f4352ac43c7454980104a1174bc89e1fea4087f5409eafc
font_01_sfnt_off000078f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78F7 10892 bytes
SHA-256: 1a4e2f5c345f783d7dbcb16d170af02b483c6482cc36d37a45f895e2774ce196