Malicious PDF — malware analysis report

Static analysis result for SHA-256 36e635fcaf1e5271…

MALICIOUS

PDF

44.5 KB Created: 2020-10-11 11:35:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 21d79114feef07ce40afb442d0ba8c6b SHA-1: b6ab326a593b1ada6e34f6c0674150ffa7b0b783 SHA-256: 36e635fcaf1e5271e4185eeb6046d5734a20af187ed2b4b8c39360db706a2771
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • 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
  • 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://ggtraff.ru/strik?keyword=subway+surf+apk+android+oyun+club In PDF document text
    • http://sutukubi.parkjungyoon.vip/uploads/1/3/2/6/132681670/zesuxuxaxuwadi.pdfIn PDF document text
    • http://files.namasteesperanza.com/uploads/1/3/1/6/131606815/4739455.pdfIn PDF document text
    • http://files.bihapi.org/uploads/1/3/2/6/132683165/judavop_rarefivubazenig_suzavuvoku.pdfIn PDF document text
    • http://lajivelap.artebom.com/uploads/1/3/2/6/132696067/3972911.pdfIn PDF document text
    • http://vodadum.morganluttig.com/uploads/1/3/0/7/130738615/xinewa-xexatop-womowe.pdfIn PDF document text
    • http://files.outdoorkindergarten.org/uploads/1/3/2/8/132815961/pajuvojo.pdfIn PDF document text
    • http://files.thetreasuredtimes.com/uploads/1/3/0/7/130740573/7426419.pdfIn PDF document text
    • http://files.tuval-mashiach-psychology-biu.org/uploads/1/3/0/8/130814515/subamenonelax.pdfIn PDF document text
    • http://ganome.ourcharismata.com/uploads/1/3/0/7/130776407/bogurafiselut-giniwux-mozimelolam-murolere.pdfIn PDF document text
    • http://files.stjuandiegoparish.com/uploads/1/3/2/6/132681164/0e3c43627c50de.pdfIn PDF document text
    • http://migezu.pwcyoga.com/uploads/1/3/0/8/130813834/0584f65.pdfIn PDF document text
    • http://somasuvo.graceandtaylor.com.au/uploads/1/3/2/6/132696048/nawanekuzamarufim.pdfIn PDF document text
    • http://files.ingridlavoiepapercutting.com/uploads/1/3/1/4/131407424/265695.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2526/8889/files/soundarya_lahari_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4220/4565/files/onan_10hdkca_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6092/8405/files/pibiredanazewopomewa.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.

FilenameKindSourceSize
font_00_sfnt_off000062b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B5 5332 bytes
SHA-256: 6b2aab3d67d189093959b8e4117f9a8dc6b65c727f5cc796958aa7b1d36d2ef1
font_01_sfnt_off000074e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74E7 10020 bytes
SHA-256: 4d4cc6d2db8760563917b631219fedef550cf541f478a63548fd6cc86403c08f
font_02_sfnt_off000096f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96F8 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378